0001564590-22-016827 | 20-F | XBRL Viewer | Chindata Group Holdings LTD

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Taxation - Schedule of Significant Components of Deferred Tax Assets and Liabilities (Details) ¥ in Thousands, $ in Thousands	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)
Deferred tax assets
Tax loss carry forward	¥ 89,147	$ 13,989	¥ 67,873
Unabsorbed capital allowance	73,567	11,544	63,297
Depreciation and amortization expense	82,957	13,018	23,887
Operating lease	59,748	9,376	60,878
Accrued expenses and others	29,212	4,584	35,245
Less: Valuation allowance	72,606	11,393	71,229
Deferred tax assets	262,025	41,118	179,951
Deferred tax liabilities
Property and equipment	329,917	51,771	222,489
Acquisition of intangible assets	86,283	13,540	105,805
Debt issuance cost	15,431	2,421	13,243
Operating lease	63,039	9,892	64,358
Others	7,439	1,168	9,698
Deferred tax liabilities	502,109	78,792	415,593
Deferred tax assets	30,866	4,844	18,789
Deferred tax liabilities	270,950	42,518	254,431
Net deferred tax liabilities	¥ 240,084	$ 37,674	¥ 235,642

Revenue (Tables)

12 Months Ended

Dec. 31, 2021

Revenue From Contract With Customer [Abstract]

Summary of Revenues From Contracts With Customers Disaggregated by Material Revenue Category

The following table presents the Group’s revenues from contracts with customers disaggregated by material revenue category:

	For the Year Ended December 31,
	2019		2020		2021
	RMB		RMB		RMB		US$
Colocation services recognized over time		678,348		1,701,911		2,649,371		415,744
Colocation rental recognized over time		128,870		124,991		114,681		17,996
Others recognized over time		45,792		4,175		88,225		13,844
		853,010		1,831,077		2,852,277		447,584

Short-Term Investment

12 Months Ended

Dec. 31, 2021

Short Term Investments [Abstract]

SHORT-TERM INVESTMENT

3. SHORT-TERM INVESTMENT

The following tables presents the Group's short-term investments:

	As of December 31,
	2020		2021		2021
	RMB		RMB		US$
Trading securities		—		129,946		20,391
Held-to-maturity debt securities		—		63,726		10,000
		—		193,672		30,391

The Group’s short-term investments include wealth management products classified as trading securities, and structured notes classified as held-to-maturity debt securities. During the years ended December 31, 2019, 2020 and 2021, the Group recorded interest income from its held-to-maturity debt securities of nil, nil and RMB350 (US$55), and recorded changes in fair value of financial instruments from its trading securities of nil, nil and RMB8,341 (US$1,309) in the consolidated statements of comprehensive (loss) income, respectively.

Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) $ in Thousands	1 Months Ended
	Jul. 31, 2019 USD ($)
Statement Of Stockholders Equity [Abstract]
Repurchase of outstanding non-controlling interests through issuance of ordinary shares	$ 44,118

Commitments and Contingencies

12 Months Ended

Dec. 31, 2021

Commitments And Contingencies Disclosure [Abstract]

COMMITMENTS AND CONTINGENCIES

19. COMMITMENTS AND CONTINGENCIES

Capital expenditure commitments

The Group has commitments amounting to RMB841,550 (US$132,058) for the purchase of certain data center equipment and construction in progress as of December 31, 2021, which are scheduled to be paid within one to two years.

Contingencies

In August 2020 (“Termination Date”), Bridge Datacentres (Mumbai) LLP (“Bridge Mumbai”), the Company’s subsidiary in India, exercised its rights under the force majeure clause and terminated its construction contact with Sterling & Wilson Private Limited (“S&W”), the contractor of its data center in India. Pursuant to the termination, S&W made a claim against Bridge Mumbai towards amounts payable for work performed through Termination Date, other costs and losses. In turn, Bridge Mumbai also submitted a claim against S&W towards the refund of cash advance payments previously made, and losses caused by S&W including delay in work performed, defective work, and replacement of contractor. In March 2021, Bridge Mumbai submitted a statement of defense. Based on management’s estimation and legal counsel’s advice, RMB31,162 (US$4,890) has been accrued and recorded in “Others, net” in the consolidated statements of comprehensive loss.

In 2021, S&W and the Bridge Mumbai have made further submissions and counter-submissions denying each other’s claims. The parties are in the process of completing the pre-trial formalities. No further consensus has been reached between S&W and the Bridge Mumbai. The Group and the legal counsel believes that the best estimation of losses remains unchanged for this arbitration.

Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2021

Property Plant And Equipment [Abstract]

Summary of Property and Equipment

	As of December 31,
	2020			2021			2021
	RMB			RMB			US$
Buildings		1,909,633			2,721,086			426,998
Data center equipment		3,945,877			4,607,321			722,989
Furniture and office equipment		11,934			17,086			2,681
Computers and network equipment		16,677			14,858			2,332
Motor vehicles		6,868			10,001			1,569
Purchased software		6,984			12,763			2,003
Leasehold improvements		36,358			48,674			7,638
Construction in progress		1,196,551			3,218,617			505,071
		7,130,882			10,650,406			1,671,281
Less: accumulated depreciation		(707,052	)		(1,222,815	)		(191,886	)
Property and equipment, net		6,423,830			9,427,591			1,479,395

Accounts Receivable - Summary of Movements in the Allowance for Credit Losses (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)
Allowance For Doubtful Accounts Receivable Rollforward
Balance at the beginning of the year	¥ 12,496	$ 1,961	¥ 4,770
Provisions/(Reversal)	(286)	(45)	7,726
Write-offs	(232)	(36)
Balance at the end of the year	924	145	¥ 12,496
ASU 2016-13
Allowance For Doubtful Accounts Receivable Rollforward
Balance at the end of the year	¥ (11,054)	$ (1,735)

Accounts Receivable - Summary of Accounts Receivable (Details) ¥ in Thousands, $ in Thousands	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 CNY (¥)
Accounts Receivable Net [Abstract]
Accounts receivable	¥ 661,951	$ 103,875	¥ 434,720
Allowance for credit losses	(924)	(145)	(12,496)	$ (1,961)	¥ (4,770)
Accounts receivable, net	¥ 661,027	$ 103,730	¥ 422,224

Organization

12 Months Ended

Dec. 31, 2021

Organization Consolidation And Presentation Of Financial Statements [Abstract]

ORGANIZATION

1. ORGANIZATION

Chindata Group Holdings Limited (the “Company”) is a limited liability company incorporated in the Cayman Islands on December 27, 2018. The Company, its subsidiaries, the variable interest entities, and subsidiaries of the variable interest entities are hereinafter collectively referred to as the “Group”. The Group is principally engaged in the provision of internet data center (“IDC”) colocation and rental services in Asia-Pacific emerging markets. The Company does not conduct any substantive operations on its own but instead conducts its primary business operations through its subsidiaries, the variable interest entities, and subsidiaries of the variable interest entities, which are primarily located in the People’s Republic of China (the “PRC” or “China”), Malaysia and India. As described below, the Company, through a series of transactions which are accounted for as a reorganization of entities and transfer of businesses under common control (the “Reorganization”), became the parent entity of its subsidiaries, the variable interest entities and the subsidiaries of the variable interest entities. Accordingly, these consolidated financial statements reflect the historical operations of the Company as if the current organization structure had been in existence throughout the periods presented.

Reorganization

In preparation for the Company’s planned IPO in the United States, the following transactions were undertaken to reorganize the legal structure of the Company and to transfer the IDC colocation and rental businesses to the Company.

(i)

Integral Investments South Asia III was incorporated on March 24, 2016 and, on November 1, 2017, acquired Bridge Data Centres Malaysia Sdn Bhd, which is engaged in the IDC rental business (collectively, “Bridge Group”). The ultimate controlling shareholder of Investments South Asia III was the same as the Company.

(ii)

On November 27, 2018, Stack Midco Limited was incorporated as a limited liability company in the Cayman Islands. The ultimate controlling shareholder of Stack Midco Limited is the same as the Company. On April 26, 2019, Stack Midco Limited purchased 100% equity interest of Chindata (Xiamen) Science and Technology Co., Ltd. (“Chindata Xiamen”), which is engaged in the IDC colocation business for a total purchase consideration of approximately RMB2,772,317(Note 17). Stack Midco Limited together with Chindata Xiamen are collectively hereinafter referred to as the Stack Group.

(iii)

On July 15, 2019 (“Reorganization Date”), the Company entered into a series of business and assets transfer agreements with Stack Group and Bridge Group, respectively, pursuant to which Stack Group and Bridge Group transferred all the operating assets and liabilities related to their IDC colocation and rental businesses, respectively, to the Company.

As all the Company, Integral Investments South Asia III and Stack Midco Limited are under common control before and after the Reorganization Date, the Reorganization is accounted for in a manner similar to a pooling-of-interest with the assets and liabilities of the parties to the Reorganization carried over at their historical amounts. All of the revenues and costs of conducting the IDC colocation and rental businesses incurred by Stack Group and Bridge Group, respectively, prior to the Reorganization but after the ultimate controlling shareholder obtained control were reflected in the Company’s consolidated statements of comprehensive (loss) income.

On July 30 and July 31, 2020, several investors acquired an aggregate of 36,860,590 ordinary shares of the Company at US$5.43 per share.

On August 14 and August 18, 2020, several investors acquired an aggregate of 119,796,921 ordinary shares of the Company at US$5.43 per share (“Pre-IPO private placements”). Among which, 9,215,147 shares were newly issued and 110,581,774 shares were sold and transferred from existing shareholders of the Company.

On October 2, 2020, the Company completed its IPO on the NASDAQ Global Select Market. The Company offered 40,000,000 ADSs representing 80,000,000 Class A ordinary shares at US$13.50 per ADS. Concurrently with the IPO, several investors purchased 10,000,000 ADSs at US$13.50 per ADS, representing 20,000,000 Class A ordinary shares (“Concurrent Private Placements”). Additionally, the underwriters exercised their options to purchase an additional 6,000,000 ADSs representing 12,000,000 Class A ordinary shares at US$13.50 per ADS. Net proceeds from the IPO including the over-allotment option and the Concurrent Private Placements after deducting underwriting discount and issuance cost were RMB4,871,804. Upon completion of the IPO, all outstanding ordinary shares were converted on a one-for-one basis into 338,584,043 Class A ordinary shares and 386,208,174 Class B ordinary shares, respectively.

The rights of the holders of Class A and Class B ordinary shares are identical, except with respect to voting and conversion rights. Each share of Class A ordinary shares is entitled to one vote and is not convertible into Class B ordinary shares under any circumstances. Each share of Class B ordinary shares is entitled to 15 votes and is convertible into one Class A ordinary share at any time by the holder thereof. Upon any transfer of Class B ordinary shares by the holder thereof to any person or entity that is not an affiliate of such holder, such Class B ordinary shares would be automatically converted into an equal number of Class A ordinary shares.

1. ORGANIZATION (Continued)

As of December 31, 2021, the Company’s principal subsidiaries, variable interest entities, and subsidiaries of the variable interest entities, are as follows:

Name	Date of establishment/ acquisition	Place of establishment	Percentage of equity interest attributable to the Company			Principal activities
Stack Midco Limited	November 27, 2018	Cayman		100	%	Investment holding
Suzhou Stack Data Technology Company Limited (“Suzhou Stack”)*	December 10, 2018	PRC		100	%	Provision of technical and consulting services
Hebei Stack Data Technology Company Limited (“Hebei Stack”)*	July 10, 2019	PRC		100	%	Provision of technical and consulting services
Chindata (Xiamen) Science and Technology Co., Ltd.	April 26, 2019	PRC		100	%	Provision of technical and consulting services
Chindata (Hebei) Co., Ltd.	April 26, 2019	PRC		100	%	Provision of technical and consulting services
Datong Qinhuai Data Company Limited	April 26, 2019	PRC		100	%	Provision of technical and consulting services
Bridge Data Centres Malaysia Sdn Bhd	November 1, 2017	Malaysia		100	%	Provision of IDC colocation rental services
Variable interest entities:
Sitan (Beijing) Data Technology Company Limited (“Beijing Sitan”)	December 19, 2018	PRC	Nil			Provision of IDC colocation services
Hebei Qinshu Information Technology Company Limited (“Hebei Qinshu”)	July 10, 2019	PRC	Nil			Provision of IDC colocation services
Variable interest entities’ subsidiaries:
Chindata (Beijing) Co., Ltd.	April 26, 2019	PRC	Nil			Provision of IDC colocation services
Sidake Hebei Data Technology Company Limited	April 26, 2019	PRC	Nil			Provision of IDC colocation services
Datong Sitan Data Science and Technology Co., Ltd.	April 26, 2019	PRC	Nil			Provision of IDC colocation services
Chindata (Shenzhen) Co., Ltd.	April 26, 2019	PRC	Nil			Provision of IDC colocation services

*	each or collectively referred to as the “WFOE”.

To comply with PRC laws and regulations which prohibit foreign control of companies that engage in value-added telecommunication services, the Group primarily conducts its business in the PRC through its variable interest entities, Beijing Sitan and Hebei Qinshu, and subsidiaries of the variable interest entities (collectively, the “VIEs”). The equity interests of the VIEs are legally held by PRC shareholders (the “Nominee Shareholders”). Despite the lack of technical majority ownership, the Company has effective control of the VIEs through a series of contractual arrangements (the “Contractual Agreements”) and a parent-subsidiary relationship exists between the Company and the VIEs. Through the Contractual Agreements, the Nominee Shareholders effectively assigned all of their voting rights underlying their equity interests in the VIEs to the WFOE, who immediately assigned the voting rights underlying their equity interests in the VIEs to Stack Midco Limited, which is a wholly-owned subsidiary of the Company. Therefore, the Company has the power to direct the activities of the VIEs that most significantly impact its economic performance. The Company also has the ability and obligation to absorb substantially all of the profits and all the expected losses of the VIEs that potentially could be significant to the VIEs. Based on the above, the Company consolidates the VIEs in accordance with SEC Regulation SX-3A-02 and Accounting Standards Codification (“ASC”) 810, Consolidation (“ASC 810”).

The following is a summary of the Contractual Agreements:

1. ORGANIZATION (Continued)

Power of Attorneys

Pursuant to the Power of Attorneys among Suzhou Stack, Beijing Sitan and its Nominee Shareholders, the Nominee Shareholders agreed to entrust to the Suzhou Stack an irrevocable proxy to exercise all of their voting rights as shareholders of Beijing Sitan and approve on behalf of the Nominee Shareholders, all related legal documents pertinent to the exercise of their rights in their capacity as the shareholders of Beijing Sitan. Suzhou Stack is also entitled to transfer or assign its voting rights to any other person or entity at its own discretion and without giving prior notice to the Nominee Shareholders or obtaining their consent. The Power of Attorneys remains valid for as long as the Nominee Shareholders remains shareholders of Beijing Sitan. Suzhou Stack may terminate the Power of Attorneys at its sole discretion, whereas under no circumstances may Beijing Sitan or its Nominee Shareholders terminate this agreement.

The terms of the Power of Attorneys signed amongst Hebei Stack, Hebei Qinshu and its Nominee Shareholders are the same as the terms described above.

Purchase Option Agreement

Pursuant to the Purchase Option Agreement among Suzhou Stack, Beijing Sitan and its Nominee Shareholders, the Nominee Shareholders irrevocably granted to Suzhou Stack or its designees (i) an exclusive option to purchase, when and to the extent permitted under PRC laws, all or part of the equity interests in Beijing Sitan or all or part of the assets held by Beijing Sitan and (ii) an exclusive right to cause the Nominee Shareholders to transfer their equity interest in Beijing Sitan to Suzhou Stack or any designated third party. Suzhou Stack has the sole discretion to decide when to exercise the option, whether in part or full. The exercise price of the option to purchase all or part of the equity interests in Beijing Sitan or assets held by Beijing Sitan will be the minimum amount of consideration permitted under the then-applicable PRC laws. Without the prior consent of Suzhou Stack, Beijing Sitan and its Nominee Shareholders shall not: (i) amend the articles of association, (ii) increase or decrease the registered capital, (iii) sell or otherwise dispose of their assets or beneficial interest, (iv) create or allow any encumbrance on their assets or other beneficial interests, (v) extend any loans to third parties, (vi) enter into any material contracts (except those contracts entered into in the ordinary course of business), (vii) merge with or acquire any other persons or make any investments, or (viii) distribute dividends to their shareholders. The Purchase Option Agreement will remain in effect until all the equity interests held by Nominee Shareholders or the assets held by Beijing Sitan are transferred to Suzhou Stack or its designated party. Suzhou Stack may terminate the Purchase Option Agreement at its sole discretion, whereas under no circumstances may Beijing Sitan or its Nominee Shareholders terminate this agreement. In April 2020, the Purchase Option Agreement was supplemented such that any proceeds received by the Nominee Shareholders from the exercise of the option, distribution of profits or dividends, shall be remitted to Suzhou Stack or its designated person(s), to the extent permitted under PRC laws.

The terms of the Purchase Option Agreement signed amongst Hebei Stack, Hebei Qinshu and its Nominee Shareholders are the same as the terms described above.

Exclusive Business Cooperation Agreement

Pursuant to the Exclusive Business Cooperation Agreement between Suzhou Stack and Beijing Sitan, Suzhou Stack has the exclusive right to provide technical and consulting services to Beijing Sitan related to the IDC business, including but not limited to the technology, management, network support, business consulting, intellectual licensing, equipment or office leasing, market consulting, system integration, product development and system maintenance. Without the prior written consent of Suzhou Stack, Beijing Sitan may not accept any services subject to this Exclusive Business Cooperation Agreement from any third party, while Suzhou Stack has the right to designate any party to provide such services. In return, Beijing Sitan agrees to pay a service fee to Suzhou Stack. Suzhou Stack has the right to unilaterally adjust the service fee. The Exclusive Business Cooperation Agreement has an initial term of ten years, which will be automatically extended for a successive ten-year term upon expiration unless terminated by Suzhou Stack at its sole discretion, whereas under no circumstances may Beijing Sitan terminate this agreement.

The terms of the Exclusive Business Cooperation Agreement signed between Hebei Stack and Hebei Qinshu are the same as the terms described above.

1. ORGANIZATION (Continued)

Equity Pledge Agreement

Under the Equity Pledge Agreement among Suzhou Stack, Beijing Sitan and its Nominee Shareholders, the Nominee Shareholders have pledged all of their equity interests in Beijing Sitan to Suzhou Stack to guarantee performance of Beijing Sitan and their obligations under the Contractual Agreements described above. During the term of the Equity Pledge Agreement, Suzhou Stack has the right to receive all of Beijing Sitan’s dividends and profits distributed on the pledged equity. In the event of a breach by Beijing Sitan or any of its Nominee Shareholders of the contractual obligations under the Equity Pledge Agreement, Suzhou Stack, as pledgee, will have the right to dispose of the pledged equity interests in Beijing Sitan and will have priority in receiving the proceeds from such disposal. Beijing Sitan and its Nominee Shareholders, undertake that, without the prior written consent of Suzhou Stack, they will not transfer, or create or allow any encumbrance on the pledged equity interests. The Equity Pledge Agreement will be valid until Beijing Sitan and its Nominee Shareholders fulfill all contractual obligations under the Contractual Agreement.

The terms of the Equity Pledge Agreement signed amongst Hebei Stack, Hebei Qinshu and its Nominee Shareholders are the same as the terms described above.

Financial Support Undertaking Letter

Pursuant to the financial support undertaking letter, Stack Midco Limited is obligated and hereby undertakes to provide unlimited financial support to the VIEs, to the extent permissible under the applicable PRC laws and regulations, whether or not any such operational loss is actually incurred. Stack Midco Limited will not request repayment of the loans or borrowings if the VIEs or its Nominee Shareholders do not have sufficient funds or are unable to repay.

Resolution of the Board of Directors of Stack Midco Limited

The Board of Directors of Stack Midco Limited resolved that the rights under the Power of Attorneys and the Purchase Option Agreement were assigned to the Board of Directors of Stack Midco Limited or any officer authorized by the Board of Directors.

In the opinion of the Company’s legal counsel, i) the ownership structure of the Company, including its subsidiaries in the PRC and VIEs are in compliance with all existing PRC laws and regulations; and (ii) each of the Contractual Agreements with Stack Midco Limited, the WFOE, VIEs and the Nominee Shareholders governed by PRC laws, are legal, valid and binding, enforceable against such parties, and will not result in any violation of PRC laws or regulations currently in effect; (iii) the resolutions are valid in accordance with the articles of association of Stack Midco Limited and Cayman Islands Law.

However, uncertainties in the PRC legal system could cause relevant regulatory authorities to find the current Contractual Agreements and businesses to be in violation of any existing or future PRC laws or regulations and could limit the Company’s ability to enforce its rights under these contractual agreements. Furthermore, the Nominee Shareholders of the VIEs may have interests that are different from those of the Company, which could potentially increase the risk that they would seek to act contrary to the terms of the Contractual Agreements with the VIEs. In addition, if the Nominee Shareholders will not remain the shareholders of the VIEs, breach, or cause the VIEs to breach, or refuse to renew, the existing Contractual Agreements the Company has with them and the VIEs, the Company may not be able to effectively control the VIEs and receive economic benefits from them, which may result in deconsolidation of the VIEs.

In addition, if the current structure or any of the Contractual Agreements were found to be in violation of any existing or future PRC laws or regulations, the Company may be subject to penalties, including but not be limited to, revocation of business and operating licenses, discontinuing or restricting business operations, restricting the Company’s right to collect revenues, restructuring of the Company’s operations, imposition of additional conditions or requirements with which the Company may not be able to comply, or other regulatory or enforcement actions against the Company that could be harmful to its business. The imposition of any of these or other penalties could have a material adverse effect on the Company’s ability to conduct its business.

1. ORGANIZATION (Continued)

The carrying amounts of the assets, liabilities and the results of operations of the VIEs are presented in aggregate due to the similarity of the purpose and design of the VIEs, the nature of the assets in these VIEs and the type of the involvement of the Company in these VIEs.

The following table sets forth the assets, liabilities, results of operations and cash flows of the VIEs included in the Company’s consolidated balance sheets, consolidated statements of comprehensive loss and consolidated statements of cash flows:

	As of December 31,
	2020		2021		2021
	RMB		RMB		US$
Current assets
Cash and cash equivalents		251,589		577,753		90,662
Short-term investments		—		129,946		20,391
Accounts receivable, net		399,451		588,518		92,351
Amounts due from subsidiaries of the Group		229,845		621,276		97,492
Value added taxes recoverable		3,367		4,273		671
Amounts due from related parties		35		—		—
Prepayments and other current assets		5,715		5,931		931
Total current assets		890,002		1,927,697		302,498
Non-current assets
Property and equipment, net		64,727		57,832		9,075
Operating lease right-of-use assets		239,155		221,708		34,791
Finance lease right-of-use assets		—		866		136
Intangible assets		20,251		17,797		2,793
Amounts due from subsidiaries of the Group		300,000		300,000		47,077
Deferred tax assets		10,598		—		—
Other non-current assets		8,783		10,114		1,587
Total non-current assets		643,514		608,317		95,459
Total assets		1,533,516		2,536,014		397,957
Current liabilities
Accounts payable		31,694		40,260		6,318
Income taxes payable		1,288		4,184		657
Amounts due to subsidiaries of the Group		1,124,418		2,111,460		331,334
Current portion of operating lease liabilities		38,054		35,990		5,648
Accrued expenses and other current liabilities		31,231		34,044		5,342
Total current liabilities		1,226,685		2,225,938		349,299
Non-current liabilities
Operating lease liabilities		204,305		188,104		29,518
Deferred tax liabilities		3,131		499		78
Other non-current liabilities		4,977		8,127		1,275
Total non-current liabilities		212,413		196,730		30,871
Total liabilities		1,439,098		2,422,668		380,170

1. ORGANIZATION (Continued)

	For the year ended December 31,
	2019			2020			2021			2021
	RMB			RMB			RMB			US$
Revenue		712,115			1,706,086			2,656,005			416,785
Net income (loss)		29			(52,771	)		2,942			462
Net cash generated from operating activities		93,468			184,998			460,676			72,290
Net cash used in investing activities		(14,762	)		(12,115	)		(133,441	)		(20,940	)
Net cash used in financing activities		—			—			(1,071	)		(168	)

The revenue-producing assets that are held by the VIEs comprise of property and equipment, and operating lease right-of-use assets. The VIEs contributed an aggregate of 83%, 93% and 93% of the Group’s consolidated revenue for the years ended December 31, 2019, 2020 and 2021, after elimination of inter-entity transactions.

As of December 31, 2021, there was no pledge or collateralization of the VIEs’ assets that can only be used to settle obligations of the VIEs. Other than the amounts due to subsidiaries of the Group (which are eliminated upon consolidation), all remaining liabilities of the VIEs are without recourse to the Company.

Organization - Additional Information (Details) ¥ in Thousands			12 Months Ended
	Oct. 02, 2020 CNY (¥)	Apr. 26, 2019 CNY (¥)	Dec. 31, 2021 shares	Dec. 31, 2020 shares	Dec. 31, 2019	Oct. 02, 2020 $ / shares shares	Aug. 18, 2020 $ / shares shares	Jul. 31, 2020 $ / shares shares
Organization [Line Items]
Number of ordinary shares acquired								36,860,590
Shares price per share \| $ / shares								$ 5.43
VIEs
Organization [Line Items]
Percentage of revenue contribution by VIE			93.00%	93.00%	83.00%
Class A Ordinary Shares
Organization [Line Items]
Common stock, shares, issued			358,376,753	344,577,783
Ordinary shares, voting rights			one vote
Class B
Organization [Line Items]
Common stock, shares, issued			368,500,979	380,214,434
Ordinary shares, voting rights			15 votes
Common stock, terms of conversion			Each share of Class B ordinary shares is entitled to 15 votes and is convertible into one Class A ordinary share at any time by the holder thereof.
Pre IPO Private Placements
Organization [Line Items]
Number of ordinary shares acquired							119,796,921
Shares price per share \| $ / shares							$ 5.43
Common stock, shares, issued							9,215,147
Number of shares sold and transferred from existing shareholders							110,581,774
IPO \| American Depositary Shares
Organization [Line Items]
Shares price per share \| $ / shares						$ 13.50
Number of ADS offered						40,000,000
IPO \| Class A Ordinary Shares
Organization [Line Items]
Common stock, shares, issued						80,000,000
Conversion of outstanding shares						338,584,043
IPO \| Class B
Organization [Line Items]
Conversion of outstanding shares						386,208,174
Concurrent Private Placement \| American Depositary Shares
Organization [Line Items]
Shares price per share \| $ / shares						$ 13.50
Number of ADS offered						10,000,000
Concurrent Private Placement \| Class A Ordinary Shares
Organization [Line Items]
Common stock, shares, issued						20,000,000
Underwriter's Option \| American Depositary Shares
Organization [Line Items]
Shares price per share \| $ / shares						$ 13.50
Number of ADS offered						6,000,000
Underwriter's Option \| Class A Ordinary Shares
Organization [Line Items]
Common stock, shares, issued						12,000,000
IPO and Concurrent Private Placement and Underwriters Option
Organization [Line Items]
Net proceed from IPO \| ¥	¥ 4,871,804
Chindata (Xiamen) Science and Technology Co., Ltd
Organization [Line Items]
Equity interest		100.00%
Purchase consideration \| ¥		¥ 2,772,317

Taxation - Reconciliation of Beginning and Ending Amounts of Unrecognized Tax Benefits (Details) - 12 months ended Dec. 31, 2021 ¥ in Thousands, $ in Thousands	CNY (¥)	USD ($)
Income Tax Disclosure [Abstract]
Balance as of December 31, 2020	¥ 4,478
Increase	59,316
Decrease	(151)
Balance as of December 31, 2021	¥ 63,643	$ 9,987

Accounts Receivable (Tables)

12 Months Ended

Dec. 31, 2021

Accounts Receivable Net [Abstract]

Summary of Accounts Receivable

	As of December 31,
	2020			2021			2021
	RMB			RMB			US$
Accounts receivable		434,720			661,951			103,875
Allowance for credit losses		(12,496	)		(924	)		(145	)
Accounts receivable, net		422,224			661,027			103,730

Summary of Movements in the Allowance for Credit Losses

The movements in the allowance for credit losses were as follows:

	2020		2021			2021
	RMB		RMB			US$
Balance at the beginning of the year		4,770		12,496			1,961
Cumulative effect of adoption of ASU 2016-13		—		(11,054	)		(1,735	)
Provisions/(Reversal)		7,726		(286	)		(45	)
Write-offs		—		(232	)		(36	)
Balance at the end of the year		12,496		924			145

Loss (Earnings) Per Share - Summary of Basic and Diluted (Loss) Earnings Per Share (Details) ¥ / shares in Units, $ / shares in Units, ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021 CNY (¥) ¥ / shares shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 CNY (¥) ¥ / shares shares	Dec. 31, 2019 CNY (¥) ¥ / shares shares
Denominator:
Weighted average number of ordinary shares outstanding	726,018,244	726,018,244	613,673,576	397,153,121
(Loss) Earnings per share-basic \| (per share)	¥ 0.44	$ 0.07	¥ (0.46)	¥ (0.44)
Denominator:
Weighted average number of ordinary shares outstanding	726,018,244	726,018,244	613,673,576	397,153,121
Denominator used for (loss) earnings per share	729,015,250	729,015,250	613,673,576	397,153,121
(Loss) Earnings per share-diluted \| (per share)	¥ 0.43	$ 0.07	¥ (0.46)	¥ (0.44)
Ordinary Shares
Numerator:
Allocation of net (loss) income available to ordinary shareholders \| ¥				¥ (174,443)
Denominator:
Weighted average number of ordinary shares outstanding				397,153,121
(Loss) Earnings per share-basic \| ¥ / shares				¥ (0.44)
Numerator:
Allocation of net (loss) income available to ordinary shareholders \| ¥				¥ (174,443)
Net (loss) income available to ordinary shareholders \| ¥				¥ (174,443)
Denominator:
Weighted average number of ordinary shares outstanding				397,153,121
Denominator used for (loss) earnings per share				397,153,121
(Loss) Earnings per share-diluted \| ¥ / shares				¥ (0.44)
Class A
Numerator:
Allocation of net (loss) income available to ordinary shareholders	¥ 153,692	$ 24,118	¥ (105,403)
Denominator:
Weighted average number of ordinary shares outstanding	352,642,396	352,642,396	228,284,218
(Loss) Earnings per share-basic \| (per share)	¥ 0.44	$ 0.07	¥ (0.46)
Numerator:
Allocation of net (loss) income available to ordinary shareholders	¥ 153,692	$ 24,118	¥ (105,403)
Reallocation of net (loss) income available to ordinary shares as a result of conversion of Class B to Class A ordinary shares	162,728	25,535	(177,942)
Net (loss) income available to ordinary shareholders	¥ 316,420	$ 49,653	¥ (283,345)
Denominator:
Weighted average number of ordinary shares outstanding	352,642,396	352,642,396	228,284,218
Share-based awards	1,705,149	1,705,149
Conversion of Class B including potential ordinary shares to Class A ordinary share	374,667,705	374,667,705	385,389,358
Denominator used for (loss) earnings per share	729,015,250	729,015,250	613,673,576
(Loss) Earnings per share-diluted \| (per share)	¥ 0.43	$ 0.07	¥ (0.46)
Class B
Numerator:
Allocation of net (loss) income available to ordinary shareholders	¥ 162,728	$ 25,535	¥ (177,942)
Denominator:
Weighted average number of ordinary shares outstanding	373,375,848	373,375,848	385,389,358
(Loss) Earnings per share-basic \| (per share)	¥ 0.44	$ 0.07	¥ (0.46)
Numerator:
Allocation of net (loss) income available to ordinary shareholders	¥ 162,728	$ 25,535	¥ (177,942)
Reallocation of net (loss) income to Class B ordinary shares	(108)	(17)
Net (loss) income available to ordinary shareholders	¥ 162,620	$ 25,518	¥ (177,942)
Denominator:
Weighted average number of ordinary shares outstanding	373,375,848	373,375,848	385,389,358
Share-based awards	1,291,857	1,291,857
Denominator used for (loss) earnings per share	374,667,705	374,667,705	385,389,358
(Loss) Earnings per share-diluted \| (per share)	¥ 0.43	$ 0.07	¥ (0.46)

Business Combination (Tables)

12 Months Ended

Dec. 31, 2021

PRC Subsidiary

Business Acquisition [Line Items]

Summary of Purchase Consideration on Acquisition Date

Details of the purchase consideration on the Acquisition Date are as follows:

	RMB
Cash consideration		2,785,820
Contingent receivable		(13,503	)
		2,772,317

Summary of Fair Value of Assets Acquired and Liabilities Assumed on Acquisition Date

The following table summarizes the fair values of the assets acquired and liabilities assumed on the Acquisition Date:

	RMB
Purchase consideration		2,772,317
Less:
Cash and cash equivalents		892,009
Restricted cash		14,771
Other current assets		304,495
Property and equipment, net		1,591,412
Customer relationships		372,025
Operating lease right-of-use assets		392,286
Other non-current assets		113,038
Other current liabilities		(670,648	)
Deferred tax liabilities		(116,019	)
Other non-current liabilities		(587,372	)
Goodwill		466,320

Huailai Huizhi Construction Co. Ltd.

Business Acquisition [Line Items]

Summary of Fair Value of Assets Acquired and Liabilities Assumed on Acquisition Date

The following table summarizes the fair values of the assets acquired and liabilities assumed on the 2020 Acquisition Date:

	RMB
Purchase consideration		39,612
Settlement of accounts payable due to Huizhi		(174,695	)
Total purchase consideration		(135,083	)
Less:
Cash and cash equivalents		16,008
Other current assets		24,085
Property and equipment, net		641
Other non-current assets		1,022
Current liabilities		(183,402	)
Goodwill		6,563

Share-Based Payments - Summary of Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
2019 Plan
Weighted average grant date fair value
Awarded and unvested, beginning balance	$ 1.68
Granted		$ 1.73
Vested	1.56
Forfeited	1.87
Awarded and unvested, ending balance	1.68	$ 1.68
Expected to vest, ending balance	$ 1.68
2019 Plan \| ESOP Holdco Class B Shares
Number of Options/ISUs
Awarded and unvested, beginning balance	9,843,125
Vested	(398,553)
Forfeited	(112,000)
Awarded and unvested, ending balance	9,332,572	9,843,125
Expected to vest, ending balance	9,332,572
ISUs
Number of Options/ISUs
Awarded and unvested, beginning balance	385,517
Granted	18,658
Vested	(169,361)
Forfeited	(22,385)
Awarded and unvested, ending balance	212,429	385,517
Expected to vest, ending balance	212,429
Weighted average grant date fair value
Awarded and unvested, beginning balance	$ 74.78
Granted	79.32
Vested	48.02
Forfeited	124.89
Awarded and unvested, ending balance	91.23	$ 74.78
Expected to vest, ending balance	$ 91.23

Summary of Significant Accounting Policies - Additional Information (Details) RM in Thousands, $ in Thousands			12 Months Ended
	Jan. 01, 2021 CNY (¥)	Jan. 01, 2021 USD ($)	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2021 MYR (RM)	Jan. 01, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2020 MYR (RM)
Summary Of Significant Accounting Policies [Line Items]
Convenience translation rate (USD to RMB)			6.3726				6.3726	6.3726
Accumulated deficit			¥ 463,465,000		¥ 681,300,000		$ 72,728
Interest expenses incurred			412,455,000	$ 64,723	330,573,000	¥ 120,170,000
Interest expenses incurred capitalized			117,477,000	$ 18,435	92,189,000	17,880,000
Impairment loss			0		0
Inventory write-downs			0		0
Impairment of long-lived assets			0		0
Goodwill impairment			0		¥ 0	¥ 0
Revenue, performance obligation			¥ 19,891,376,000				3,121,391
Foreign currency exchange rate appreciation			2.30%	2.30%	6.30%
RMB US and MYR-Denominated Borrowings \| Interest Rate Risk
Summary Of Significant Accounting Policies [Line Items]
Hypothetical increase or decrease in annual interest rates of denominated borrowings			1.00%	1.00%
Increase or decrease total interest expense			¥ 51,671,000				8,108
Customers \| Accounts Receivable \| Customer One
Summary Of Significant Accounting Policies [Line Items]
Concentration of credit risk percent			10.00%	10.00%	10.00%
Customers \| Revenue \| Customer One
Summary Of Significant Accounting Policies [Line Items]
Concentration of credit risk percent			83.20%	83.20%	81.70%	68.20%
Customers \| Revenue \| Customer Two
Summary Of Significant Accounting Policies [Line Items]
Concentration of credit risk percent						11.10%
PRC
Summary Of Significant Accounting Policies [Line Items]
Employee benefit expenses			¥ 53,465,000	$ 8,390	¥ 18,385,000	¥ 16,210,000
Malaysia
Summary Of Significant Accounting Policies [Line Items]
Employee benefit expenses			991,000	156	1,049,000	1,150,000
Others, Net
Summary Of Significant Accounting Policies [Line Items]
Gain (loss) from equity method investments			(3,201,000)
Derivative
Summary Of Significant Accounting Policies [Line Items]
Notional amount of derivative contracts					110,000,000		$ 29,000	RM 396,654		$ 160,000	RM 644,654
Gain (loss) recognized			¥ (1,620,000)	$ (254)	¥ (20,479,000)	¥ (12,316,000)
ASU 2016-13
Summary Of Significant Accounting Policies [Line Items]
Accounting Standards Update, adoption date	Jan. 01, 2021								Jan. 01, 2021
Cumulative Effect Period of Adoption Adjustment \| ASU 2016-13
Summary Of Significant Accounting Policies [Line Items]
Accumulated deficit	¥ 8,323,000								$ 1,306
Accumulated deficit, income tax effect	¥ (2,219,000)	$ (348)
Minimum
Summary Of Significant Accounting Policies [Line Items]
Revenue performance obligation period			1 year	1 year
Maximum
Summary Of Significant Accounting Policies [Line Items]
Revenue performance obligation period			10 years	10 years

Intangible Assets

12 Months Ended

Dec. 31, 2021

Goodwill And Intangible Assets Disclosure [Abstract]

INTANGIBLE ASSETS

8. INTANGIBLE ASSETS

	As of December 31,
	2020			2021			2021
	RMB			RMB			US$
Acquired customer relationships		397,979			396,499			62,219
Acquired license and others		2,556			30,834			4,839
Less: accumulated amortization		(80,236	)		(121,533	)		(19,071	)
Intangible assets, net		320,299			305,800			47,987

The Group recorded amortization expense of RMB32,760, RMB42,292 and RMB42,221 (US$6,625) for the years ended December 31, 2019, 2020 and 2021, respectively. As of December 31, 2021, estimated amortization expense of the existing intangible assets for each of the next five years is RMB42,405, RMB45,414, RMB47,720, RMB47,227 and RMB39,697, respectively.

Segment Information - Summary of Long-lived Assets by Geographic Area (Details) ¥ in Thousands, $ in Thousands	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)
Revenues From External Customers And Long Lived Assets [Line Items]
Long-lived assets	¥ 10,367,960	$ 1,626,960	¥ 7,204,128
PRC
Revenues From External Customers And Long Lived Assets [Line Items]
Long-lived assets	8,829,539	1,385,547	6,016,479
Malaysia
Revenues From External Customers And Long Lived Assets [Line Items]
Long-lived assets	911,623	143,054	958,408
India
Revenues From External Customers And Long Lived Assets [Line Items]
Long-lived assets	¥ 626,798	$ 98,359	¥ 229,241

Property and Equipment - Summary of Property and Equipment (Details) ¥ in Thousands, $ in Thousands	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)
Property Plant And Equipment [Line Items]
Property and equipment, gross	¥ 10,650,406	$ 1,671,281	¥ 7,130,882
Less: accumulated depreciation	(1,222,815)	(191,886)	(707,052)
Property and equipment, net	9,427,591	1,479,395	6,423,830
Buildings
Property Plant And Equipment [Line Items]
Property and equipment, gross	2,721,086	426,998	1,909,633
Data Center Equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross	4,607,321	722,989	3,945,877
Furniture and Office Equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross	17,086	2,681	11,934
Computers and Network Equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross	14,858	2,332	16,677
Motor Vehicles
Property Plant And Equipment [Line Items]
Property and equipment, gross	10,001	1,569	6,868
Purchased Software
Property Plant And Equipment [Line Items]
Property and equipment, gross	12,763	2,003	6,984
Leasehold Improvements
Property Plant And Equipment [Line Items]
Property and equipment, gross	48,674	7,638	36,358
Construction in Progress
Property Plant And Equipment [Line Items]
Property and equipment, gross	¥ 3,218,617	$ 505,071	¥ 1,196,551

Consolidated Balance Sheets ¥ in Thousands, $ in Thousands	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)
Current assets
Cash and cash equivalents	¥ 4,390,293	$ 688,933	¥ 6,705,612
Restricted cash	460,174	72,211	102,598
Short-term investments	193,672	30,391	0
Accounts receivable, net of allowance of RMB12,496 and RMB924 (US$145) as of December 31, 2020 and 2021, respectively	661,027	103,730	422,224
Value added taxes recoverable	327,553	51,400	182,982
Amount due from related parties	0	0	64,093
Prepayments and other current assets	314,604	49,368	112,467
Total current assets	6,347,323	996,033	7,589,976
Non-current assets
Property and equipment, net	9,427,591	1,479,395	6,423,830
Operating lease right-of-use assets	803,544	126,094	635,683
Finance lease right-of use assets	136,825	21,471	144,615
Intangible assets	305,800	47,987	320,299
Goodwill	472,883	74,206	472,883
Deferred tax assets	30,866	4,844	18,789
Restricted cash	390,535	61,283	103,253
Value added taxes recoverable	424,011	66,537	357,125
Other non-current assets	342,573	53,755	193,145
Total non-current assets	12,334,628	1,935,572	8,669,622
Total assets	18,681,951	2,931,605	16,259,598
Current liabilities (including current liabilities of the consolidated VIEs without recourse to the primary beneficiary of RMB102,267 and RMB114,478 (US$17,965) as of December 31, 2020 and 2021, respectively):
Short-term bank loans	260,980	40,953	66,135
Current portion of long-term bank loans	1,689,545	265,126	230,778
Accounts payable	1,701,299	266,971	1,186,030
Amounts due to related parties	38,832	6,094	37,468
Income taxes payable	49,168	7,716	47,272
Current portion of operating lease liabilities	45,501	7,140	40,131
Current portion of finance lease liabilities	4,765	748	4,906
Derivative liabilities			8,671
Accrued expenses and other current liabilities	511,257	80,227	211,549
Total current liabilities	4,301,347	674,975	1,832,940
Non-current liabilities (including non-current liabilities of the consolidated VIEs without recourse to the primary beneficiary of RMB212,413 and RMB196,730 (US$30,871) as of December 31, 2020 and 2021, respectively):
Long-term bank loans	3,526,460	553,379	3,892,120
Operating lease liabilities	198,806	31,197	204,305
Finance lease liabilities	57,002	8,945	59,986
Deferred tax liabilities	270,950	42,518	254,431
Derivative liabilities	16,354	2,566	16,123
Other non-current liabilities	196,400	30,819	260,225
Total non-current liabilities	4,265,972	669,424	4,687,190
Total liabilities	8,567,319	1,344,399	6,520,130
Shareholders’ equity
Ordinary shares	46	7	46
Additional paid-in capital	10,646,328	1,670,641	10,510,516
Statutory reserves	189,700	29,768	82,792
Accumulated other comprehensive loss	(257,977)	(40,482)	(172,586)
Accumulated deficit	(463,465)	(72,728)	(681,300)
Total shareholders’ equity	10,114,632	1,587,206	9,739,468
Total liabilities and shareholders’ equity	¥ 18,681,951	$ 2,931,605	¥ 16,259,598

Business Combination

12 Months Ended

Dec. 31, 2021

Business Combinations [Abstract]

BUSINESS COMBINATION

17. BUSINESS COMBINATION

2019 Acquisition

On April 26, 2019 (the “Acquisition Date”), the Group through its PRC subsidiary acquired 100% of the equity interests in Chindata Xiamen, a PRC company, to further develop the Group’s IDC colocation services. Details of the purchase consideration on the Acquisition Date are as follows:

	RMB
Cash consideration		2,785,820
Contingent receivable		(13,503	)
		2,772,317

Pursuant to the acquisition agreement, the Group has an enforceable right to the return of previously transferred consideration of up to RMB48,000 in aggregate, if certain predetermined performance targets are not achieved by Chindata Xiamen during 2019 and 2020, respectively. The Group determined the fair value of the contingent receivable on the Acquisition Date, and as of December 31, 2019 and December 31, 2020 with the assistance of an independent appraiser. During the years ended December 31, 2019, 2020 and 2021, a remeasurement gain of RMB1,127, RMB7,762 and RMB5,884(US$923), respectively, was recognized through profit or loss. In 2021, the Group settles the contingent receivable with the amount of RMB19,493(US$3,059).

The acquisition was accounted for as a business combination. Goodwill recognized represents the expected synergies from integrating Chindata Xiamen’s operations with the Group’s existing IDC colocation services, and is not tax deductible. The purchase price allocation for the acquisition is based on a valuation determined by the Group with the assistance of an independent appraiser. The following table summarizes the fair values of the assets acquired and liabilities assumed on the Acquisition Date:

	RMB
Purchase consideration		2,772,317
Less:
Cash and cash equivalents		892,009
Restricted cash		14,771
Other current assets		304,495
Property and equipment, net		1,591,412
Customer relationships		372,025
Operating lease right-of-use assets		392,286
Other non-current assets		113,038
Other current liabilities		(670,648	)
Deferred tax liabilities		(116,019	)
Other non-current liabilities		(587,372	)
Goodwill		466,320

17. BUSINESS COMBINATION (Continued)

Identifiable intangible assets acquired are customer relationships, which was valued using a relief from royalty approach and has an estimated remaining useful life of approximately 10 years.

The unaudited pro forma revenue and pro forma net loss attributable to the Company was RMB1,098,383 and RMB141,745, respectively for the year ended December 31, 2019 giving effect to the acquisition as if it had occurred at January 1, 2018.

2020 Acquisition

On November 1, 2020(the “2020 Acquisition Date”), the Group completed its acquisition of 100% equity interest of Huailai Huizhi Construction Co., Ltd. (“Huizhi”) for purchase consideration of RMB39,612, to enhance its data center construction expertise to generate cost savings for colocation services.

The acquisition was accounted for as a business combination. Goodwill recognized represents the expected synergies from integrating Huizhi’s operation with the Group’s existing IDC colocation services, and is not tax deductible. The purchase price allocation for the acquisition is based on a valuation determined by the Group with the assistance of an independent appraiser. The following table summarizes the fair values of the assets acquired and liabilities assumed on the 2020 Acquisition Date:

	RMB
Purchase consideration		39,612
Settlement of accounts payable due to Huizhi		(174,695	)
Total purchase consideration		(135,083	)
Less:
Cash and cash equivalents		16,008
Other current assets		24,085
Property and equipment, net		641
Other non-current assets		1,022
Current liabilities		(183,402	)
Goodwill		6,563

The actual results of operations after the Acquisition Date and pro-forma results of operations for this acquisition have not been presented because the effects of this acquisition were insignificant after elimination of the transactions between the Group and Huizhi.

Summary of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2021

Accounting Policies [Abstract]

Basis of Presentation

The consolidated financial statements have been prepared in accordance with United States generally accepted accounting principles (“U.S. GAAP”).

Principles of Consolidation

The consolidated financial statements of the Group include the financial statements of the Company, its subsidiaries, and the VIEs for which a wholly-owned subsidiary of the Company is the primary beneficiary. All significant intercompany balances and transactions have been eliminated upon consolidation. Results of subsidiaries, businesses acquired from third parties and the VIEs are consolidated from the date on which control is obtained by the Company.

Use of estimates

The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosures of contingent assets and liabilities at the balance sheet dates and the reported amounts of revenue and expenses during the reporting periods. Significant estimates and assumptions reflected in the Group’s consolidated financial statements include, but are not limited to, the allowance for credit losses (previously known as the allowance for doubtful accounts before the adoption of ASU 2016-13) of accounts receivable, other receivable and debt securities, the purchase price allocation with respect to business combinations, useful lives of long-lived assets, impairment of long-lived assets and goodwill, realization of deferred tax assets, measurement of right-of-use assets and lease liabilities including incremental borrowing rate (“IBR”) used in measurement, legal contingencies, share-based compensation, and the fair value of financial instruments. Management bases the estimates on historical experience and various other assumptions that are believed to be reasonable, the results of which form the basis for making judgments about the carrying values of assets and liabilities. Actual results could materially differ from those estimates.

Comparative Information

Certain line items in the financial information of the VIEs presented in Note 1 have been adjusted to conform with the current year’s presentation to facilitate comparison.

Convenience translation

Amounts in U.S. dollars are presented for the convenience of the reader and are translated at the noon buying rate of RMB6.3726 per US$1.00 on December 31, 2021 in the City of New York for cable transfers of RMB as certified for customs purposes by the Federal Reserve Bank of New York. No representation is made that the RMB amounts could have been, or could be, converted into US$ at such rate.

Foreign currency

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Foreign currency

The Group’s financial information is presented in Renminbi (“RMB”). The functional currency of the Company and the subsidiaries in Cayman is U.S. dollars (“US$”). The functional currency of the Company’s subsidiaries in Malaysia is the Malaysian Ringgit (“MYR”). The functional currency of the Company’s subsidiaries in India is Indian Rupees (“INR”). The functional currency of the Company’s subsidiaries and the VIEs located in the PRC is RMB. Transactions denominated in foreign currencies are re-measured into the functional currency at the exchange rates prevailing on the transaction dates. Monetary assets and liabilities denominated in foreign currencies are re-measured at the exchange rates prevailing at the balance sheet date. Non-monetary items that are measured in terms of historical cost in foreign currency are re-measured using the exchange rates at the dates of the initial transactions. Exchange gains and losses are included in the consolidated statements of comprehensive loss. The Company uses the average exchange rate for the year and the exchange rate at the balance sheet date to translate the operating results and financial position, respectively. Translation differences are recorded in “Accumulated other comprehensive income (loss)”, a component of shareholders’ equity.

Cash and cash equivalents

Cash and cash equivalents consist of cash on hand and time deposits or other highly liquid investments placed with banks which are unrestricted as to withdrawal or use and have original maturities of less than three months.

Restricted cash

Restricted cash primarily represent cash and cash equivalents, pledged as security for the Group’s bank loans.

Short-term investment

Short-term investments consist primarily of investments in certain wealth management products and structured notes with original maturities greater than three months but less than twelve months or no maturities. The investment in debt securities that the Group has the positive intent and the ability to hold to maturity are classified as held-to-maturity securities and stated at amortized cost. The investment in debt securities that are bought and held principally for the purpose of selling them in the near term are classified as trading securities.

For held-to-maturity debt securities, the allowance for credit losses reflects the Group's estimated expected losses over the contractual lives of the debt securities and is recorded as a charge to “General and administrative expenses” in the consolidated statements of comprehensive (loss) income. Estimated allowances of credit losses are determined by considering reasonable and supportable forecasts of future economic conditions in addition to information about past events and current conditions.

Accounts receivable

On January 1, 2021, the Group adopted Accounting Standard Update (“ASU”) 2016-13, Measurement of Credit Losses on Financial Instruments (“ASU 2016-13”), using a modified retrospective transition method, which resulted in a cumulative-effect adjustment to decrease the opening balance of accumulated deficit on January 1, 2021 by RMB8,323(US$1,306), after net of RMB2,219 (US$348) of income taxes.

The Group maintains an allowance for credit losses for accounts receivable, which is recorded as an offset to accounts receivable, and the estimated credit losses charged to the allowance is classified as “General and administrative expenses” in the consolidated statements of comprehensive (loss) income. When similar risk characteristics exist, the Group assesses collectability and measures expected credit losses on a collective basis for a pool of assets, whereas if similar risk characteristics do not exist, the Group assesses collectability and measures expected credit losses on an individual asset basis. In determining the amount of the allowance for credit losses, the Group considers historic collection experience, the age of the accounts receivable balances, credit quality of the Group’s customers, current economic conditions, reasonable and supportable forecasts of future economic conditions, and other factors that may affect the customer’s ability to pay.

Prior to adopting ASU 2016-13, accounts receivable is carried at net realizable value. An allowance for doubtful accounts is recorded when collection of the full amount is no longer probable. In evaluating the collectability of receivable balances, the Group considers specific evidence including the aging of the receivable, the customer’s payment history, its current credit-worthiness and current economic trends. Accounts receivable are written off when deemed uncollectible.

Capitalized interest

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Capitalized interest

Interest, including amortization of deferred financing costs, associated with major development and construction projects is capitalized and included in construction in progress in accordance with ASC 835, Interest (“ASC 835”). The capitalization of interest commences when expenditure for the asset is being incurred, interest costs are being incurred and activities that are necessary to prepare the asset for its intended use or sale are in progress. The capitalization of interest ceases when the project is substantially completed or the development activity is suspended for more than a brief period. The amount to be capitalized is determined by applying the weighted average interest rate of the Group’s outstanding borrowings to the average amount of accumulated qualifying capital expenditures for assets under construction during the year. Total interest expenses incurred amounted to RMB120,170, RMB330,573 and RMB412,455(US$64,723), of which RMB17,880, RMB92,189 and RMB117,477 (US$18,435) were capitalized for the years ended December 31, 2019, 2020 and 2021, respectively.

Derivative instruments

ASC Topic 815, Derivatives and Hedging (“ASC 815”), requires all contracts that meet the definition of a derivative to be recognized on the balance sheet as either assets or liabilities and recorded at fair value. The Group’s derivatives represent target accrual forward transaction, the embedded call option, cross currency swap, and non-deliverable forward that did not qualify for hedge accounting in accordance with ASC 815. The derivatives are accounted for at fair value by recording the unrealized mark-to-market (fair value adjustment) in each period in the consolidated statements of comprehensive (loss) income within “Changes in fair value of financial instruments”. The notional amounts of the derivative contracts were MYR396,654 and US$29,000, respectively, as of December 31, 2021, and MYR644,654, US$160,000 and RMB110,000, respectively, as of December 31, 2020. A loss of RMB12,316, RMB20,479 and RMB1,620 (US$254) was recognized in the consolidated statements of comprehensive (loss) income for the years ended December 31, 2019, 2020 and 2021, respectively. The estimated fair value of the derivatives is determined at discrete points in time with reference to the market rates using industry standard valuation techniques. The fair value of the Group’s derivatives was determined utilizing market observable forward exchange rates. During all periods presented, there were no changes in valuation technique; or transfers in and out of each level.

Fair value measurements

Financial instruments of the Group primarily include cash and cash equivalents, restricted cash, short-term investments, accounts receivable, derivatives, contingent receivable, amounts due from and due to related parties, accounts payable, certain other current assets and liabilities, short-term bank loans and long-term bank loans. The carrying amount of the long-term bank loans approximates its fair value due to the fact that the related interest rate approximates the interest rates currently offered by financial institutions for similar debt instruments of comparable maturities. The derivatives and contingent receivable were recorded at fair value as determined on the respective issuance or origination date and subsequently adjusted to its fair value at each reporting date. The Group determined the fair values of the derivatives and contingent receivable with the assistance of an independent appraiser. The Group applies ASC 820 Fair Value Measurements and Disclosures (“ASC 820”), in measuring fair value. ASC 820 defines fair value, establishes a framework for measuring fair value and requires disclosures to be provided on fair value measurement. The carrying values of the remaining financial instruments approximate their fair values due to their short-term maturities.

ASC 820 establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value as follows:

Level 1 — Observable inputs that reflect quoted prices (unadjusted) for identical assets or liabilities in active markets.

Level 2 — Include other inputs that are directly or indirectly observable in the marketplace.

Level 3 — Unobservable inputs which are supported by little or no market activity.

ASC 820 describes three main approaches to measuring the fair value of assets and liabilities: (1) market approach; (2) income approach and (3) cost approach. The market approach uses prices and other relevant information generated from market transactions involving identical or comparable assets or liabilities. The income approach uses valuation techniques to convert future amounts to a single present value amount. The measurement is based on the value indicated by current market expectations about those future amounts. The cost approach is based on the amount that would currently be required to replace an asset.

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Fair value measurements (Continued)

Assets and liabilities measured at fair value on a recurring basis as of December 31, 2020 are summarized below:

	Quoted price in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
	RMB		RMB		RMB
Derivative liabilities		—		24,794		—
Contingent receivable		—		—		13,609

Assets and liabilities measured at fair value on a recurring basis as of December 31, 2021 are summarized below:

	Quoted price in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
	RMB		RMB		RMB
Short-term investments
Trading securities		129,946		—		—
Held-to-maturity debt securities		—		63,726		—
Derivative assets		—		2,446		—
Derivative liabilities		—		16,354		—

The Group measured the fair value of its contingent receivable on a recurring basis using significant unobservable (Level 3) inputs as of each report date. The valuation of the contingent receivable is performed using Monte Carlo simulation model with unobservable inputs including weighted average cost of capital as well as the performance target, which is assessed by the Group.

The following table presents a reconciliation of all financial instruments measured at fair value on a recurring basis using Level 3 unobservable inputs:

	Contingent receivable
	RMB
Balance as of January 1, 2020		14,630
Settlement		(8,783	)
Fair value change		7,762
Balance as of December 31, 2020		13,609
Fair value change		5,884
Settlement		(19,493	)
Balance as of December 31, 2021		—
The amount of total gain for the year ended December 31, 2021		5,884
The amount of total gain for the year ended December 31, 2021 (US$)		923

The Group did not transfer any assets or liabilities in or out of Level 3 during all periods presented.

Equity method investments

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Equity method investments

The Group’s investments in entities in which the Group can exercise significant influence but does not own a majority equity interest or control are generally accounted for under the equity method of accounting. Equity method investments are initially measured at cost, and are subsequently adjusted for cash contributions, distributions and the Group's share of the income and losses of the investees. The Group records its equity method investment in “Other non-current assets” in the consolidated balance sheets. The Group's proportionate share of the income or loss from its equity method investment are recorded in “Others, net” in the consolidated statements of comprehensive (loss) income, which was RMB3,201 for the year ended December 31, 2021. The share of income or loss from equity method investments was immaterial for the year ended December 31, 2020. The Group reviews its investment periodically to determine if any investment may be impaired considering both qualitative and quantitative factors that may have a significant impact on the investees' fair value. No impairment loss was recognized for the years presented.

Property and equipment, net

Property and equipment are stated at cost and are depreciated using the straight-line method over the estimated useful lives of the assets, as follows:

Category		Estimated Useful Life
Buildings		20 to 40 years
Data center equipment
– Machinery		10 to 20 years
– Other equipment		3 to 5 years
Furniture and office equipment		3 to 5 years
Computers and network equipment		3 to 5 years
Motor vehicles		3 to 10 years
Purchased software		5 to 10 years
Leasehold improvements		Lesser of useful life or lease term

Repair and maintenance costs are charged to expense as incurred, whereas the cost of renewals and betterments that extend the useful lives of property and equipment are capitalized as additions to the related assets. Retirements, sales and disposals of assets are recorded by removing the cost and accumulated depreciation from the asset and accumulated depreciation accounts with any resulting gain or loss reflected in the consolidated statements of comprehensive (loss) income.

Direct costs that are related to the construction of property and equipment and incurred in connection with bringing the assets to their intended use are capitalized as construction in progress. Construction in progress is transferred to specific property and equipment, and the depreciation of these assets commences when the assets are ready for their intended use.

Inventories

Inventories consist of materials used in delivering the Group’s other services to the customers, which are stated at the lower of cost and net realizable value. Cost is determined using the weighted average method. Adjustments to reduce the cost of inventory to its net realizable value are made, if required, for decreases in sales price, obsolescence, or similar reductions in the estimated net realizable value. The Group records its inventories in “Prepayments and other current assets” in the consolidated balance sheets. No inventory write-downs were recognized for all years presented.

Intangible assets, net

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Intangible assets, net

Intangible assets are carried at cost less accumulated amortization and any recorded impairment. Intangible assets with finite useful lives are amortized using a straight-line method of amortization that reflects the estimated pattern in which the economic benefits of the intangible asset are to be consumed. The estimated useful life for the intangible assets is as follows:

Category		Estimated Useful Life
Acquired customer relationships		5 to 10 years
Acquired license and others		2 to 4 years

Impairment of long-lived assets other than goodwill

The Group evaluates its long-lived assets for impairment whenever events or changes in circumstances, such as a significant adverse change to market conditions that will impact the future use of the assets, indicate that the carrying amount of an asset may not be fully recoverable. When these events occur, the Group evaluates the recoverability of long-lived assets by comparing the carrying amount of the assets to the future undiscounted cash flows expected to result from the use of the assets and their eventual disposition. If the sum of the expected undiscounted cash flows is less than the carrying amount of the assets, the Group recognizes an impairment loss based on the excess of the carrying amount of the assets over their fair value. Fair value is generally determined by discounting the cash flows expected to be generated by the assets, when the market prices are not readily available. For all periods presented, there was no impairment of any of the Group’s long-lived assets.

Segment reporting

In accordance with ASC 280-10, Segment Reporting: Overall, operating segments are defined as components of an enterprise about which separate financial information is available that is evaluated regularly by the chief operating decision maker (“CODM”), in deciding how to allocate resources and in assessing performance. The Group operates and manages its business as a single segment through the provision of a single class of standardized IDC services in Asia-Pacific emerging markets. Therefore, the Group’s CODM, who has been identified as the Board of Directors, reviews the consolidated results when making decisions about allocating resources and assessing performance of the Group as a whole (Note 20).

Business combinations

The Group accounts for its business combinations using the purchase method of accounting in accordance with ASC 805, Business Combinations. The purchase method accounting requires that the consideration transferred be allocated to the assets, including separately identifiable assets and liabilities acquired, based on their estimated fair values. The consideration transferred in an acquisition is measured as the aggregate of the fair values at the date of exchange of the assets given, liabilities incurred, and equity instruments issued as well as the contingent considerations and all contractual contingencies as of the acquisition date. The costs directly attributable to the acquisition are expensed as incurred. Identifiable assets, liabilities and contingent liabilities acquired or assumed are measured separately at their fair value as of the acquisition date, irrespective of the extent of any non-controlling interests. The excess of (i) the total of cost of acquisition, fair value of the non-controlling interests and acquisition date fair value of any previously held equity interest in the acquiree over (ii) the fair value of the identifiable net assets of the acquiree, is recorded as goodwill. If the cost of acquisition is less than the fair value of the net assets of the subsidiary acquired, the difference is recognized directly in earnings.

The determination and allocation of fair values to the identifiable assets acquired, liabilities assumed and non-controlling interests is based on various assumptions and valuation methodologies requiring considerable judgment from management. The most significant variables in these valuations are discount rates, terminal values, the number of years on which to base the cash flow projections, as well as the assumptions and estimates used to determine the cash inflows and outflows. The Group determine discount rates to be used based on the risk inherent in the related activity’s current business model and industry comparisons. Terminal values are based on the expected life of assets, forecasted life cycle and forecasted cash flows over that period.

Acquisitions that do not meet the accounting definition of a business combination are accounted for as asset acquisitions. For transactions determined to be asset acquisitions, the Group allocates the total cost of the acquisition, including transaction costs, to the assets acquired based on their relative fair values.

Goodwill

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Goodwill

In accordance with ASC 350, Intangibles—Goodwill and Other (“ASC 350”), the Group assigned and assessed goodwill for impairment at the reporting unit level. A reporting unit is an operating segment or one level below the operating segment. The Group determined that there are two reporting units as of December 31, 2020 and 2021, Bridge Group and Stack Group. Under ASC 350, goodwill is not amortized but is tested for impairment on an annual basis, or more frequently if events or changes in circumstances indicate that it might be impaired. In accordance to ASU No. 2011-08, Intangibles—Goodwill and Other (“ASU 2011-08”), the Group can elect to perform a qualitative assessment to determine whether the two-step impairment testing on goodwill is necessary. The Group adopted ASU 2017-04, Intangibles—Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment (“ASU 2017-04”), which eliminates the requirement to calculate the implied fair value of goodwill and record the amount of goodwill impairment as the excess of a goodwill allocated to the reporting unit’s carrying amount over its fair value, not to exceed the total amount of goodwill allocated to the reporting unit. The Group assesses qualitative factors such as business changes, economic outlook, financial trends and forecast, growth rates, industry data and other relevant qualitative factors to determine if it’s more-likely-than-not that the goodwill might be impaired and whether it’s necessary to perform a quantitative goodwill impairment. If the qualitative factors indicate a potential impairment, the Company compares the carrying amount of a reporting unit to its fair value. No impairment of goodwill was recorded for the years ended December 31, 2019, 2020 and 2021 (Note 9).

Comprehensive (loss) income

Comprehensive (loss) income is defined as the changes in equity of the Group during a period from transactions and other events and circumstances excluding transactions resulting from investments by shareholders and distributions to shareholders. Among other disclosures, ASC 220, Comprehensive Income, requires that all items that are required to be recognized under current accounting standards as components of comprehensive (loss) income be reported in a financial statement that is displayed with the same prominence as other financial statements. For each of the periods presented, the Group’s comprehensive (loss) income includes net (loss) income and foreign currency translation adjustments, and is presented in the consolidated statements of comprehensive (loss) income.

Leases

The Group determines if an arrangement is a lease at inception in accordance with ASC 842, Leases (“ASC 842”). Leases are classified as operating or finance leases in accordance with the recognition criteria in ASC 842-10-25. The Group’s leases do not contain any material residual value guarantees or material restrictive covenants.

Lessee accounting

The Group recognizes right-of-use (“ROU”) assets and liabilities on the lease commencement date based on the present value of lease payments over the lease term. As the rate implicit in the Group’s leases is not typically readily available, the Group uses an incremental borrowing rate based on the information available at the lease commencement date in determining the present value of lease payments. This incremental borrowing rate reflects the fixed rate at which the Group could borrow on a collateralized basis the amount of the lease payments in the same currency, for a similar term, in a similar economic environment. The ROU assets also include any lease payments made, net of lease incentives. Lease terms are based on the non-cancelable term of the lease and may contain options to extend the lease when it is reasonably certain that the Group will exercise that option. Leases with an initial lease term of 12 months or less are not recorded on the consolidated balance sheets.

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

The Group has lease agreements with lease and non-lease components, which are accounted for as a single lease component based on the Group’s policy election to combine lease and non-lease components for its leases. Variable lease payments not dependent on an index or rate are excluded from the ROU asset and lease liability calculations and are recognized in expense in the period which the obligation for those payments is incurred. Operating lease expense for lease payments is recognized on a straight-line basis over the lease term. A finance lease ROU asset is depreciated on a straight-line basis over the lesser of the useful life of the leased asset or the lease term. Interest on each finance lease liability is determined as the amount that results in a constant periodic discount rate on the remaining balance of the liability.

Lessor accounting

The Group’s lessor portfolio consists of only operating leases for the periods presented. The Group’s policy election is to combine lease and non-lease components, by underlying class of asset, and account for them as one component if they have the same timing and pattern of transfer. The combined component is accounted for in accordance with ASC 842 if the lease component is predominant, and in accordance with ASC 606, Revenue from Contracts with Customers (“ASC 606”) if the non-lease component is predominant.

Revenue recognition

The Group applies the five-step model outlined in ASC 606. The Group accounts for a contract when it has approval and commitment from the customer, the rights of the parties are identified, payment terms are identified, the contract has commercial substance and collectability of consideration is probable.

Revenue is allocated to each performance obligation based on its standalone selling price. The Group generally determines standalone selling prices based on observable prices. If the standalone selling price is not observable through past transactions, the Group estimates the standalone selling price based on multiple factors, including, but not limited to, gross margin objectives, internal costs, and industry technology lifecycles. Variable consideration is included in the transaction price if, in our judgment, it is probable that a significant future reversal of cumulative revenue recognized under the contract will not occur. Timing of revenue recognition is generally the same as the timing of invoicing to customers. Contract assets and contract liabilities were nil as of December 31, 2020 and 2021. Using the practical expedient in ASC 606, the Group does not adjust the promised amount of consideration for the effects of a significant financing component if it expects, at contract inception, that the period between the transfer of the promised good or service to the customer and when the customer pays for that good or service will be one year or less. The Group also elected to exclude sales taxes and other similar taxes from the measurement of the transaction price, and accordingly, recognized revenues net of value added taxes (“VAT”) and surcharges.

Colocation services

The Group provides integrated IDC colocation services including utilities, hosting, cooling and maintenance (collectively, “Colocation Resources”) to its customers for operating their servers and IT equipment in the Group’s data centers in the PRC. The nature of the Group’s performance obligation is a single performance obligation to stand ready to provide a series of distinct IDC colocation services daily throughout the fixed contract period. The Group is a lessor in certain IDC colocation service arrangements and the lease component qualifies as an operating lease. Under ASC 842, these contracts qualify for a practical expedient available to lessors to combine the lease and non-lease components and account for the combined component in accordance with the accounting treatment for the predominant component. The Group applied this practical expedient and have accounted for the combined component under ASC 606 because the non-lease components are predominant.

For wholesale and retail data center contracts, the Group’s efforts or inputs are expended evenly throughout the performance period that typically ranges from one to ten years, hence, the Group recognizes revenue over time using a time-based measure, on a straight-line basis. The remaining hyperscale data center contracts include a contractual minimum resulting in a portion of the consideration being fixed (“Fixed Consideration”). The Group’s efforts or inputs are not expended evenly throughout the performance period, which is generally ten years for such contracts. The Fixed Consideration is included in the transaction price for the entire contract period, and recognized as revenue based on cumulative utilization of capacity from contract inception through the end of the reporting period. The variable consideration for each month is allocated to the distinct colocation services for the particular month in accordance with ASC 606-10-32-40 because the variable consideration relates to the Group’s efforts to satisfy the collocation services for that month and reflects the value of the Group’s colocation services delivered to the customer. Therefore, the Group uses monthly utilization records, an output measure, to recognize revenue over time as it most faithfully depicts the simultaneous consumption and delivery of services. At the end of each month, the uncertainty related to the transaction price is resolved based on the utilization records because the variable consideration specifically relates to the transfer of the distinct services during that month.

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Revenue recognition (Continued)

Colocation rental

The Group rents out hyperscale data center space to customers in Malaysia. The Group applied the practical expedient to account for lease and non-lease components associated with the lease as a single lease component under ASC 842 as the lease component is predominant. Colocation rental revenue is recognized on a straight-line basis over the lease term.

Others

Other revenue mainly includes revenues from fiber optic cable and other fitting services provided at the customers’ request and the construction service. The Group uses construction progress reports, an output measure, to recognize revenue over time provided all revenue recognition criteria have been met, as it most faithfully depicts the Group’s performance toward complete satisfaction of the performance obligation.

As of December 31, 2021, the aggregate amount of transaction price allocated to performance obligations (unsatisfied or partially unsatisfied) is related to colocation services, does not include any variable consideration, and amounted to RMB19,891,376 (US$3,121,391). The Company expects to recognize as revenue 11%, 48% and 41% of these performance obligations within twelve months, one to five years, and after five years, respectively.

Value-Added Taxes Recoverable

The Group is subject to VAT on proceeds received from customers and records revenue net of VAT. Entities that are VAT general taxpayers are allowed to offset qualified input VAT paid to suppliers against their output VAT liabilities. The Group has input VAT greater than output VAT for all periods presented, net VAT balance is recorded as value-added taxes recoverable. If output VAT is greater than input VAT, net VAT balance is recorded as value-added taxes payable.

Cost of revenues

Cost of revenues consists mainly of utility fees, depreciation of property and equipment, bandwidth costs, rental costs, salaries and benefits for employees directly involved in revenue generation activities, and other expenses directly attributable to the provision of services.

Research and development expense

Research and development expenses primarily consist of salaries and benefits for research and development personnel, and third party service provider costs. The Group expenses research and development costs as they are incurred.

Government grants

Government grants received from provincial and local governments are related to acquisition of assets. The grants are recorded as “deferred government grants” and are included in the “Accrued expenses and other current liabilities”, or “Other non-current liabilities” line items in the consolidated balance sheets when received. Once the Group fulfills the conditions stipulated under the grant, the grant amount will be released to the consolidated statements of comprehensive (loss) income in equal amounts over the expected useful life of the related asset, as a reduction of the related depreciation expense.

Share-based compensation

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Share-based compensation

The Group applies ASC 718, Compensation — Stock Compensation (“ASC 718”), to account for its share-based payments. In accordance with ASC 718, the Group determines whether an award should be classified and accounted for as a liability award or equity award. For equity awards, the related share-based compensation is recognized in the consolidated financial statements based on their grant date fair value, while liability awards are remeasured at each reporting date until settlement. All the Group’s share-based awards are to employees only, the Group, with the assistance of an independent appraiser determined the fair value of the share-based awards granted to employees. The Group uses the accelerated method for all awards granted with graded vesting, and accounts for forfeitures as they occur.

A change in any of the terms or conditions of the awards is accounted for as a modification of the award. Cancellation of the awards accompanied by the concurrent grant of a replacement award is also accounted for as a modification of the terms of the cancelled awards. Incremental compensation cost is measured as the excess, if any, of the fair value of the modified award over the fair value of the original award immediately before its terms are modified, measured based on the fair value of the awards and other pertinent factors at the modification date. For vested awards, the Group recognizes incremental compensation cost in the period the modification occurs. For unvested awards, the Group recognizes over the remaining requisite service period and upon the satisfaction of performance condition, the sum of the incremental compensation cost and the remaining unrecognized compensation cost for the original award on the modification date. If the fair value of the modified award is lower than the fair value of the original award immediately before modification, the minimum compensation cost the Group recognizes is the cost of the original award.

Employee benefit expenses

All eligible employees of the Group in the PRC are entitled to staff welfare benefits including medical care, welfare subsidies, unemployment insurance and pension benefits through a PRC government-mandated multi-employer defined contribution plan. The Group is required to accrue for these benefits based on certain percentages of the qualified employees’ salaries and to make contributions to the plans out of the amounts accrued. The PRC government is responsible for the medical benefits and the pension liability to be paid to these employees and the Group’s obligations are limited to the amounts contributed. The Group recorded employee benefit expenses of RMB16,210, RMB18,385 and RMB53,465 (US$8,390) for the years ended December 31, 2019, 2020 and 2021, respectively.

The Group also maintains a government mandated employee provident fund schemes to cover employees of its wholly owned subsidiaries in Malaysia. The employee provident fund schemes are considered a defined contribution plan. Employer and employee contributions are made based on various percentages of salaries and wages that vary based on employee age and other factors. The Group’s contributions into the program amounted to RMB1,150, RMB1,049 and RMB991 (US$156) for the years ended December 31, 2019, 2020 and 2021, respectively.

The Group has no further payment obligations once the contributions have been paid.

(Loss) earnings per share

In accordance with ASC 260, Earnings Per Share (“ASC 260”), basic (loss) earnings per share is computed by dividing net (loss) income attributable to the Company by the weighted average number of ordinary shares outstanding during the period. Diluted (loss) earnings per share is calculated by dividing net (loss) income attributable to the Company as adjusted for the effect of dilutive ordinary equivalent shares, if any, by the weighted average number of ordinary and dilutive ordinary equivalent shares outstanding during the period. Share options with performance conditions are considered contingently issuable shares and are only included in the computation of diluted (loss) earnings per share to the extent that the performance conditions are met such that the share options are exercisable at the end of the reporting period, assuming it was the end of the contingency period. Ordinary equivalent shares consist of the ordinary shares issuable upon the conversion of the share options, using the treasury stock method. Ordinary equivalent shares are excluded from the computation of diluted per share if their effects would be anti-dilutive. The computation of the diluted (loss) earnings per Class A ordinary share assumes the conversion of Class B ordinary shares to Class A ordinary shares, while diluted (loss) earnings per Class B ordinary share does not assume the conversion of such shares.

The liquidation and dividend rights of the holders of the Company’s Class A and Class B ordinary shares are identical, except with respect to voting rights and conversion (Note 1). As a result, and in accordance with ASC 260, the undistributed (loss) income for each year is allocated based on the contractual participation rights of the Class A and Class B ordinary shares as if the (loss) income for the year had been distributed. As the liquidation and dividend rights are identical, the undistributed (loss) income is allocated on a proportionate basis. Further, as the conversion of Class B ordinary shares is assumed in the computation of the diluted earnings per Class A ordinary share, the undistributed (loss) income is equal to net (loss) income for that computation.

Income taxes

The Group follows the liability method of accounting for income taxes in accordance with ASC 740, Income Taxes (“ASC 740”). Under this method, deferred tax assets and liabilities are determined based on the difference between the financial reporting and tax bases of assets and liabilities using enacted tax rates that will be in effect in the period in which the differences are expected to reverse. The Group records a valuation allowance to offset deferred tax assets if based on the weight of available evidence, it is more-likely-than-not that some portion, or all, of the deferred tax assets will not be realized. The assessment of realizability of deferred tax assets involves significant assumptions used in the projection of future taxable income and the future reversal pattern of taxable temporary differences. The effect on deferred taxes of a change in tax rate is recognized in tax expense in the period that includes the enactment date of the change in tax rate.

The Group accounted for uncertainties in income taxes in accordance with ASC 740. Interest and penalties arising from underpayment of income taxes shall be computed in accordance with the related PRC tax law. The amount of interest expense is computed by applying the applicable statutory rate of interest to the difference between the tax position recognized and the amount previously taken or expected to be taken in a tax return. Interest and penalties recognized in accordance with ASC 740 are classified in the consolidated statements of comprehensive loss as income tax expense.

In accordance with the provisions of ASC 740, the Group recognizes in its consolidated financial statements the impact of a tax position if a tax return position or future tax position is “more likely than not” to prevail based on the facts and technical merits of the position. Tax positions that meet the “more likely than not” recognition threshold are measured at the largest amount of tax benefit that has a greater than fifty percent likelihood of being realized upon settlement. The Group’s estimated liability for unrecognized tax benefits, if any, will be recorded in the “other non-current liabilities” in the accompanying consolidated financial statements is periodically assessed for adequacy and may be affected by changing interpretations of laws, rulings by tax authorities, changes and/or developments with respect to tax audits, and expiration of the statute of limitations. The actual benefits ultimately realized may differ from the Group’s estimates. As each audit is concluded, adjustments, if any, are recorded in the Group’s consolidated financial statements. Additionally, in future periods, changes in facts, circumstances, and new information may require the Group to adjust the recognition and measurement estimates with regard to individual tax positions. Changes in recognition and measurement estimates are recognized in the period in which the changes occur.

Contingencies

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Contingencies

The Group records accruals for certain of its outstanding legal proceedings or claims when it is probable that a liability will be incurred and the amount of loss can be reasonably estimated. The Group evaluates, on a quarterly basis, developments in legal proceedings or claims that could affect the amount of any accrual, as well as any developments that would make a loss contingency both probable and reasonably estimable. The Group discloses the amount of the accrual if it is material.

When a loss contingency is not both probable and estimable, the Group does not record an accrued liability but discloses the nature and the amount of the claim, if material. However, if the loss (or an additional loss in excess of the accrual) is at least reasonably possible, then the Group discloses an estimate of the loss or range of loss, unless it is immaterial or an estimate cannot be made. The assessment of whether a loss is probable or reasonably possible, and whether the loss or a range of loss is estimable, often involves complex judgments about future events. Management is often unable to estimate the loss or a range of loss, particularly where (i) the damages sought are indeterminate, (ii) the proceedings are in the early stages, or (iii) there is a lack of clear or consistent interpretation of laws specific to the industry-specific complaints among different jurisdictions. In such cases, there is considerable uncertainty regarding the timing or ultimate resolution of such matters, including eventual loss, fine, penalty or business impact, if any.

Concentration of risks

Concentration of credit risk

Assets that potentially subject the Group to significant concentration of credit risk primarily consist of cash and cash equivalents, restricted cash, accounts receivable, contingent receivable and amounts due from related parties. The Group expects that there is no significant credit risk associated with cash and cash equivalents and restricted cash, which were held by reputable financial institutions in the jurisdictions where the Company, its subsidiaries, and the VIEs are located. The Group believes that it is not exposed to unusual risks as these financial institutions have high credit quality. The risk with respect to the contingent receivable is mitigated by the ongoing assessment of the counterparty’s credit quality by reference to the counterparty’s default history. Accounts receivable and amounts due from related parties are typically unsecured and are derived from revenues earned from customers. The risk is mitigated by credit evaluations the Group performs on its customers and its ongoing monitoring process of outstanding balances. As of December 31, 2020 and 2021, the Group had one and one customer with a receivable balance exceeding 10% of the total accounts receivable balance, respectively. The risk with respect to accounts receivable is mitigated by credit evaluations the Group performs on its customers and its ongoing monitoring process of outstanding balances.

Concentration of risks (Continued)

Business, customer, political, social and economic risks

The Group participates in a dynamic and competitive high technology industry and believes that changes in any of the following areas could have a material adverse effect on the Group’s future financial position, results of operations or cash flows: changes in the overall demand for services; competitive pressures due to existing competitors; and new trends in new technologies and industry standards; control of telecommunication infrastructures by local regulators and industry standards; changes in certain strategic relationships or customer relationships; regulatory considerations; cybersecurity regulations; and risks associated with the Group’s ability to attract and retain employees necessary to support its growth. The Group’s operations could be adversely affected by significant political, economic and social uncertainties in the PRC.

Two customers accounted for 68.2% and 11.1%, respectively, of total revenues during the year ended December 31, 2019. One customer accounted for 81.7% and 83.2% of total revenues during the years ended December 31, 2020 and 2021.

Interest rate risk

The Group is exposed to interest rate risk on its interest-bearing liabilities. As of December 31, 2021, a hypothetical 1% increase or decrease in annual interest rates of RMB-denominated borrowings, US-denominated borrowings and MYR-denominated borrowings, in aggregate, would increase or decrease total interest expense by approximately RMB51,671 (US$8,108).

Investments in floating rate interest earning instruments carry a degree of interest rate risk. The Group has not been, and do not expect to be, exposed to material interest rate risks relating to such investments.

Currency convertibility risk

The Group transacts a majority of its business in RMB, which is not freely convertible into foreign currencies. On January 1, 1994, the PRC government abolished the dual rate system and introduced a single rate of exchange as quoted daily by the PBOC. However, the unification of the exchange rates does not imply that the RMB may be readily convertible into US$ or other foreign currencies. All foreign exchange transactions continue to take place either through the PBOC or other banks authorized to buy and sell foreign currencies at the exchange rates quoted by the PBOC. Approval of foreign currency payments by the PBOC or other institutions requires submitting a payment application form together with suppliers’ invoices, shipping documents and signed contracts. Additionally, the value of the RMB is subject to changes in central government policies and international economic and political developments affecting supply and demand in the PRC foreign exchange trading system market.

Foreign currency exchange rate risk

From July 21, 2005, the RMB is permitted to fluctuate within a narrow and managed band against a basket of certain foreign currencies. For RMB against U.S. dollar, there was an appreciation of approximately 6.3% and 2.3% during the years ended December 31, 2020 and 2021, respectively. It is difficult to predict how market forces or PRC or U.S. government policy may impact the exchange rate between the RMB and the U.S. dollar in the future. To the extent that the Group needs to convert U.S. dollar into RMB for capital expenditures and working capital and other business purposes, appreciation of RMB against U.S. dollar would have an adverse effect on the RMB amount the Group would receive from the conversion. Conversely, if the Group decides to convert RMB into U.S. dollar for the purpose of making payments for dividends on ordinary shares, strategic acquisitions or investments or other business purposes, appreciation of U.S. dollar against RMB would have a negative effect on the U.S. dollar amount available to the Group. In addition, a significant depreciation of the RMB against the U.S. dollar may significantly reduce the U.S. dollar equivalent of the Group’s earnings or losses.

Recent accounting pronouncements

In October 2021, the Financial Accounting Standards Board (“FASB”) issued ASU No. 2021-08, Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers (ASU 2021-08), which clarifies that an acquirer of a business should recognize and measure contract assets and contract liabilities in a business combination in accordance with ASC 606. The new amendments are effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. The amendments should be applied prospectively to business combinations occurring on or after the effective date of the amendments, with early adoption permitted. The Group is currently evaluating the impact of the new guidance on the consolidated financial statements.

Consolidated Balance Sheets (Parenthetical) ¥ in Thousands, $ in Thousands	Dec. 31, 2021 CNY (¥) shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 CNY (¥) shares
Accounts receivables, allowance	¥ 924	$ 145	¥ 12,496
Current liabilities	4,301,347	674,975	1,832,940
Non-current liabilities	4,265,972	$ 669,424	4,687,190
Common stock, par value per share \| $ / shares		$ 0.00001
VIEs
Current liabilities	2,225,938	$ 349,299	1,226,685
Non-current liabilities	196,730	30,871	212,413
VIEs \| Nonrecourse
Current liabilities	114,478	17,965	102,267
Non-current liabilities	¥ 196,730	$ 30,871	¥ 212,413
Class A Ordinary Shares
Common stock, shares authorized	4,500,000,000	4,500,000,000	4,500,000,000
Common stock, shares, issued	358,376,753	358,376,753	344,577,783
Common stock, value, outstanding	358,376,753	358,376,753	344,577,783
Class B Ordinary Shares
Common stock, shares authorized	500,000,000	500,000,000	500,000,000
Common stock, shares, issued	368,500,979	368,500,979	380,214,434
Common stock, value, outstanding	368,500,979	368,500,979	380,214,434

Organization - Schedule of Principal Subsidiaries Variable Interest Entities and Subsidiaries of Variable Interest Entities (Details)	12 Months Ended
	Dec. 31, 2021
Stack Midco Limited \| Cayman
Principal Subsidiaries VIE And Subsidiaries Of VIE [Line Item]
Date of establishment/ acquisition	Nov. 27, 2018
Place of establishment	Cayman
Percentage of equity interest attributable to the Company	100.00%
Principal activities	Investment holding
Suzhou Stack \| PRC
Principal Subsidiaries VIE And Subsidiaries Of VIE [Line Item]
Date of establishment/ acquisition	Dec. 10, 2018
Place of establishment	PRC
Percentage of equity interest attributable to the Company	100.00%
Principal activities	Provision of technical and consulting services
Hebei Stack \| PRC
Principal Subsidiaries VIE And Subsidiaries Of VIE [Line Item]
Date of establishment/ acquisition	Jul. 10, 2019
Place of establishment	PRC
Percentage of equity interest attributable to the Company	100.00%
Principal activities	Provision of technical and consulting services
Chindata (Xiamen) Science and Technology Co., Ltd \| PRC
Principal Subsidiaries VIE And Subsidiaries Of VIE [Line Item]
Date of establishment/ acquisition	Apr. 26, 2019
Place of establishment	PRC
Percentage of equity interest attributable to the Company	100.00%
Principal activities	Provision of technical and consulting services
Chindata (Hebei) Co Ltd \| PRC
Principal Subsidiaries VIE And Subsidiaries Of VIE [Line Item]
Date of establishment/ acquisition	Apr. 26, 2019
Place of establishment	PRC
Percentage of equity interest attributable to the Company	100.00%
Principal activities	Provision of technical and consulting services
Datong Qinhuai Data Company Limited \| PRC
Principal Subsidiaries VIE And Subsidiaries Of VIE [Line Item]
Date of establishment/ acquisition	Apr. 26, 2019
Place of establishment	PRC
Percentage of equity interest attributable to the Company	100.00%
Principal activities	Provision of technical and consulting services
Bridge Data Centres Malaysia Sdn Bhd \| Malaysia
Principal Subsidiaries VIE And Subsidiaries Of VIE [Line Item]
Date of establishment/ acquisition	Nov. 01, 2017
Place of establishment	Malaysia
Percentage of equity interest attributable to the Company	100.00%
Principal activities	Provision of IDC colocation rental services
VIEs \| Beijing Sitan \| PRC
Principal Subsidiaries VIE And Subsidiaries Of VIE [Line Item]
Date of establishment/ acquisition	Dec. 19, 2018
Place of establishment	PRC
Principal activities	Provision of IDC colocation services
VIEs \| Hebei Qinshu \| PRC
Principal Subsidiaries VIE And Subsidiaries Of VIE [Line Item]
Date of establishment/ acquisition	Jul. 10, 2019
Place of establishment	PRC
Principal activities	Provision of IDC colocation services
VIEs \| Chindata Beijing Co Ltd \| PRC
Principal Subsidiaries VIE And Subsidiaries Of VIE [Line Item]
Date of establishment/ acquisition	Apr. 26, 2019
Place of establishment	PRC
Principal activities	Provision of IDC colocation services
VIEs \| Sidake Hebei Data Technology Company Limited \| PRC
Principal Subsidiaries VIE And Subsidiaries Of VIE [Line Item]
Date of establishment/ acquisition	Apr. 26, 2019
Place of establishment	PRC
Principal activities	Provision of IDC colocation services
VIEs \| Datong Sitan Data Science and Technology Co Ltd \| PRC
Principal Subsidiaries VIE And Subsidiaries Of VIE [Line Item]
Date of establishment/ acquisition	Apr. 26, 2019
Place of establishment	PRC
Principal activities	Provision of IDC colocation services
VIEs \| Shenzhen \| PRC
Principal Subsidiaries VIE And Subsidiaries Of VIE [Line Item]
Date of establishment/ acquisition	Apr. 26, 2019
Place of establishment	PRC
Principal activities	Provision of IDC colocation services

Business Combination - Summary of Fair Value of Assets Acquired and Liabilities Assumed on Acquisition Date (Details) ¥ in Thousands, $ in Thousands	Nov. 01, 2020 CNY (¥)	Apr. 26, 2019 CNY (¥)	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)
Business Acquisition [Line Items]
Goodwill			¥ 472,883	$ 74,206	¥ 472,883
PRC Subsidiary
Business Acquisition [Line Items]
Total purchase consideration		¥ 2,772,317
Cash and cash equivalents		892,009
Restricted cash		14,771
Other current assets		304,495
Property and equipment, net		1,591,412
Customer relationships		372,025
Operating lease right-of-use assets		392,286
Other non-current assets		113,038
Other current liabilities		(670,648)
Deferred tax liabilities		(116,019)
Other non-current liabilities		(587,372)
Goodwill		466,320
Purchase consideration		¥ 2,772,317
Huailai Huizhi Construction Co. Ltd.
Business Acquisition [Line Items]
Settlement of accounts payable due to Huizhi	¥ (174,695)
Total purchase consideration	(135,083)
Cash and cash equivalents	16,008
Other current assets	24,085
Property and equipment, net	641
Other non-current assets	1,022
Current liabilities	(183,402)
Goodwill	6,563
Purchase consideration	¥ 39,612

Bank Loans - Summary of Group's Borrowings (Details) ¥ in Thousands, $ in Thousands	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)
Secured Longterm Debt Current And Noncurrent [Abstract]
Secured short-term bank loans	¥ 260,980	$ 40,953	¥ 66,135
Secured long-term bank loans	5,216,005	818,505	4,122,898
Bank loan	¥ 5,476,985	$ 859,458	¥ 4,189,033

Intangible Assets - Schedule of Intangible Assets (Details) ¥ in Thousands, $ in Thousands	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)
Goodwill And Intangible Assets Disclosure [Abstract]
Acquired customer relationships	¥ 396,499	$ 62,219	¥ 397,979
Acquired license and others	30,834	4,839	2,556
Less: accumulated amortization	(121,533)	(19,071)	(80,236)
Intangible assets, net	¥ 305,800	$ 47,987	¥ 320,299

Accumulated Other Comprehensive Income (Loss) - Summary of Accumulated Other Comprehensive Income (Loss) (Parenthetical) (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2019 CNY (¥)
Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]
Foreign currency translation adjustments, net of tax	¥ 0	$ 0	¥ 0	¥ 0

Summary of Significant Accounting Policies - Schedule of Estimated Useful Life for Intangible Assets (Details)	12 Months Ended
	Dec. 31, 2021
Minimum \| Acquired Customer Relationships
Acquired Finite Lived Intangible Assets [Line Items]
Estimated useful life for intangible assets	5 years
Minimum \| Acquired License and Others
Acquired Finite Lived Intangible Assets [Line Items]
Estimated useful life for intangible assets	2 years
Maximum \| Acquired Customer Relationships
Acquired Finite Lived Intangible Assets [Line Items]
Estimated useful life for intangible assets	10 years
Maximum \| Acquired License and Others
Acquired Finite Lived Intangible Assets [Line Items]
Estimated useful life for intangible assets	4 years

Revenue - Summary of Revenues From Contracts With Customers Disaggregated by Material Revenue Category (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2019 CNY (¥)
Disaggregation Of Revenue [Line Items]
Total revenue	¥ 2,852,277	$ 447,584	¥ 1,831,077	¥ 853,010
Colocation Services Recognized Over Time
Disaggregation Of Revenue [Line Items]
Total revenue	2,649,371	415,744	1,701,911	678,348
Colocation Rental Recognized Over Time
Disaggregation Of Revenue [Line Items]
Total revenue	114,681	17,996	124,991	128,870
Others Recognized Over Time
Disaggregation Of Revenue [Line Items]
Total revenue	¥ 88,225	$ 13,844	¥ 4,175	¥ 45,792

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8906-108599

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 40
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9031-108599

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9038-108599

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130543-203045

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9054-108599

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130545-203045

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 924
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 11.L)
-URI http://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856

+ Details

Consolidated Statements of Comprehensive (Loss) Income ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021 CNY (¥) ¥ / shares shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 CNY (¥) ¥ / shares shares	Dec. 31, 2019 CNY (¥) ¥ / shares shares
Revenue
Total revenue	¥ 2,852,277	$ 447,584	¥ 1,831,077	¥ 853,010
Cost of revenue
Gross profit	1,199,613	188,245	732,781	242,789
Operating expenses
Selling and marketing expenses	(89,654)	(14,069)	(99,092)	(47,496)
General and administrative expenses	(359,470)	(56,409)	(564,286)	(232,837)
Research and development expenses	(75,344)	(11,823)	(41,175)	(24,510)
Total operating expenses	(524,468)	(82,301)	(704,553)	(304,843)
Operating (loss) income	675,145	105,944	28,228	(62,054)
Interest income	58,607	9,197	27,616	7,161
Interest expense	(294,978)	(46,288)	(238,384)	(102,290)
Foreign exchange loss	(4,726)	(742)	(3,548)	(2,438)
Changes in fair value of financial instruments	12,605	1,978	(12,717)	(11,189)
Others, net	24,183	3,795	(17,201)	(633)
(Loss) income before income taxes	470,836	73,884	(216,006)	(171,443)
Income tax benefit (expense)	(154,416)	(24,231)	(67,339)	1,742
Net (loss) income	316,420	49,653	(283,345)	(169,701)
Less: Net income attributable to non-controlling interests				4,742
Net (loss) income attributable to Chindata Group Holdings Limited	¥ 316,420	$ 49,653	¥ (283,345)	¥ (174,443)
Net (loss) earnings per share:
Basic \| (per share)	¥ 0.44	$ 0.07	¥ (0.46)	¥ (0.44)
Diluted \| (per share)	¥ 0.43	$ 0.07	¥ (0.46)	¥ (0.44)
Shares used in the net (loss) earnings per share:
Basic \| shares	726,018,244	726,018,244	613,673,576	397,153,121
Diluted \| shares	729,015,250	729,015,250	613,673,576	397,153,121
Other comprehensive income (loss), net of tax of nil:
Foreign currency translation adjustments	¥ (85,391)	$ (13,400)	¥ (212,597)	¥ 21,967
Comprehensive (loss) income	231,029	36,253	(495,942)	(147,734)
Less: Comprehensive income attributable to non-controlling interests				4,742
Comprehensive (loss) income attributable to Chindata Group Holdings Limited	231,029	36,253	(495,942)	(152,476)
Colocation Services
Revenue
Total revenue	2,649,371	415,744	1,701,911	678,348
Cost of revenue
Cost of revenue	(1,446,544)	(226,994)	(960,586)	(422,254)
Colocation Services \| Third Party
Revenue
Total revenue	2,649,371	415,744	1,618,857	583,277
Colocation Services \| Related Party
Revenue
Total revenue			83,054	95,071
Colocation Rental
Revenue
Total revenue	114,681	17,996	124,991	128,870
Cost of revenue
Cost of revenue	(125,188)	(19,645)	(135,160)	(152,961)
Others
Revenue
Total revenue	88,225	13,844	4,175	45,792
Cost of revenue
Cost of revenue	¥ (80,932)	$ (12,700)	¥ (2,550)	¥ (35,006)

Lease - Summary of Minimum Lease Payments Expected to be Collected (Details) - Dec. 31, 2021 ¥ in Thousands, $ in Thousands	CNY (¥)	USD ($)
Leases [Abstract]
Year ending December 31, 2022	¥ 116,332	$ 18,255
Year ending December 31, 2023	222,606	34,932
Year ending December 31, 2024	216,924	34,040
Year ending December 31, 2025	227,801	35,747
Year ending December 31, 2026 and thereafter	841,633	132,071
Total	¥ 1,625,296	$ 255,045

Related Party Transactions

12 Months Ended

Dec. 31, 2021

RELATED PARTY TRANSACTIONS

14. RELATED PARTY TRANSACTIONS

a)	Related parties

Affiliate of the Company (collectively hereinafter referred to as “Company Affiliates”)

Wangsu Science and Technology Limited Corporation (“Wangsu”)

Zhangjiakou Qinyun Information Technology Co., Ltd. (“Qinyun”)

Hebei Jizongneng Energy Development Co., Ltd("Jizongneng")

Affiliates of ultimate controlling shareholder of the Company (collectively hereinafter referred to as “Affiliates”)

Bain Capital Private Equity Advisors (China) Ltd.

Bain Capital Private Equity, LP

Bain Capital Mauritius

BCPE Bridge Cayman L.P.

BCC Mauritius Holdings PCC

Affiliates of certain shareholders of the Company (collectively hereinafter referred to as “Shareholder Affiliates”)

Abiding Joy HK Limited

Stackdata Joy HK Limited

Datalake HK Limited

b)	The Group had the following related party transactions, except for transactions disclosed in other notes:

	For the year ended December 31,
	2019		2020		2021		2021
	RMB		RMB		RMB		US$
Purchase of services from Wangsu*		104,312		83,382		—		—
Purchase of services from Jizongneng**		—		—		10,541		1,654
Net revenue from colocation services provided to Wangsu***		95,071		83,054		—		—
Management consulting services provided by Affiliates****		16,434		59,741		—		—
Management consulting services provided by Shareholder Affiliates****		8,438		13,016		—		—
Gain on divestiture of Qinyun and related assets*****		—		6,562		—		—
		224,255		245,755		10,541		1,654

A portion of the services purchased comprised of certain Colocation Resources purchased from Wangsu, which are not distinct within the context of the Company’s revenue arrangement with Wangsu. Thus, in accordance with ASC 606-10-32-25, the entire consideration for these Colocation Resources (“Consideration Payable”) is accounted for as a reduction of revenue.

**	Utility purchased from Jizongneng for the Group’s IDC colocation services business was recognized as cost of revenues.

***

Colocation services revenue from Wangsu for the period April 26, 2019 to December 31, 2019 and January 1, 2020 to October 2, 2020 have been presented net of Consideration Payable amounting to RMB70,861 and RMB62,440, respectively. Wangsu ceased to be a related party of the Company after the completion of IPO.

****	In connection with the IPO, the Company recognized a one-time consulting agreements’ termination expense amounting to RMB50,000 and RMB11,000, payable in cash to the Affiliates and the Shareholder Affiliates, respectively.

*****

On August 4, 2020, the Group disposed 100% of equity interests of Qinyun for nil consideration as Qinyun was in a net deficit position, of which 99.9% and 0.1% was transferred to the Group’s former Chief Executive Officer, Mr. Jing Ju and a third-party individual, respectively. Subsequently, the Group transferred certain assets to Qinyun for cash consideration of RMB64,000, which is recorded in due from related party, as a noncash investing activity in consolidated statements of cash flows. The gain resulting from the divestiture of Qinyun and related assets transfer was RMB6,562.

c)	The Group had the following related party balances at the end of the year:

14. RELATED PARTY TRANSACTIONS (Continued)

	As of December 31,
	2020		2021		2021
	RMB		RMB		US$
Amounts due from related parties:
Company Affiliates		64,093		—		—
Amounts due to related parties:
Company Affiliates		—		6,754		1,060
Affiliates		490		478		75
Shareholder Affiliates		36,978		31,600		4,959
		37,468		38,832		6,094

All the balances with related parties as of December 31, 2020 and 2021 were unsecured. All outstanding balances are also repayable on demand unless otherwise disclosed. No provision for credit losses was recognized for the amount due from related parties for the years ended December 31, 2019, 2020 and 2021.

Condensed Financial Information of the Parent Company (Tables)

12 Months Ended

Dec. 31, 2021

Condensed Financial Information Of Parent Company Only Disclosure [Abstract]

Condensed Financial Statements

Condensed Balance Sheets

	As of December 31,
	2020			2021			2021
	RMB			RMB			US$
ASSETS
Current assets
Cash and cash equivalents		3,514,736			459,522			72,109
Short-term investments		—			63,726			10,000
Amounts due from subsidiaries of the Group		2,894			2,890			454
Other current assets		—			2,964			465
Total current assets		3,517,630			529,102			83,028
Non-current assets
Investment in and amounts due from subsidiaries of the Group		6,318,785			9,657,859			1,515,528
Other non-current assets		—			595			93
Total non-current assets		6,318,785			9,658,454			1,515,621
Total assets		9,836,415			10,187,556			1,598,649
LIABILITIES AND SHAREHOLDER’S EQUITY
Current liabilities
Amounts due to related parties		36,978			31,600			4,959
Accrued expenses and other payables		28,410			18,721			2,937
Total current liabilities		65,388			50,321			7,896
Non-current liabilities:
Other non-current liabilities		31,559			22,603			3,547
Total non-current liabilities		31,559			22,603			3,547
Total liabilities		96,947			72,924			11,443
Shareholders’ equity
Ordinary shares (par value of US$0.00001 per share,4,500,000,000 Class A ordinary shares authorized, 344,577,783 Class A ordinary shares issued and outstanding; 500,000,000 Class B ordinary shares authorized, 380,214,434 Class B ordinary shares issued and outstanding as of December 31, 2020; 4,500,000,000 Class A ordinary shares authorized, 358,376,753 Class A ordinary shares issued and outstanding, 500,000,000 Class B ordinary shares authorized, 368,500,979 Class B ordinary shares issued and outstanding as of December 31, 2021)		46			46			7
Additional paid-in capital		10,510,516			10,646,328			1,670,641
Statutory reserve		82,792			189,700			29,768
Accumulated other comprehensive loss		(172,586	)		(257,977	)		(40,482	)
Accumulated deficit		(681,300	)		(463,465	)		(72,728	)
Total shareholders’ equity		9,739,468			10,114,632			1,587,206
Total liabilities and shareholders’ equity		9,836,415			10,187,556			1,598,649

21. CONDENSED FINANCIAL INFORMATION OF THE PARENT COMPANY (Continued)

Condensed Statements of Comprehensive (Loss) income

	For the year ended December 31,
	2019			2020			2021			2021
	RMB			RMB			RMB			US$
Operating expenses
Sales and marketing expenses		—			—			(235	)		(37	)
General and administrative expenses		(33,523	)		(53,945	)		(19,900	)		(3,123	)
Total operating expenses		(33,523	)		(53,945	)		(20,135	)		(3,160	)
Operating loss		(33,523	)		(53,945	)		(20,135	)		(3,160	)
Interest income		—			1,854			5,200			816
Interest expense		47			—			—			—
Share of (loss) income of subsidiaries and the VIEs		(140,967	)		(232,287	)		318,481			49,977
Foreign currency exchange (loss) gain		—			(1,193	)		89			14
Changes in fair value of financial instruments		—			—			4,465			701
Others, net		—			2,226			8,320			1,306
Net (loss) income attributable to ordinary shareholders		(174,443	)		(283,345	)		316,420			49,654
Other comprehensive income (loss) (foreign currency translation adjustments), net of tax of nil:		21,967			(212,597	)		(85,391	)		(13,400	)
Comprehensive (loss) income		(152,476	)		(495,942	)		231,029			36,254

21. CONDENSED FINANCIAL INFORMATION OF THE PARENT COMPANY (Continued)

Condensed Statements of Cash Flows

	For the year ended December 31,
	2019			2020			2021			2021
	RMB			RMB			RMB			US$
Net cash used in operating activities		(26,093	)		(22,553	)		(6,049	)		(949	)
Net cash used in investing activities		(601,174	)		(2,893,144	)		(2,887,209	)		(453,066	)
Net cash generated from (used in) financing activities		637,792			6,683,039			(4,285	)		(672	)
Effect of exchange rate changes on cash and cash equivalents		(43	)		(263,088	)		(157,671	)		(24,743	)
Net increase (decrease) in cash and cash equivalents		10,482			3,504,254			(3,055,214	)		(479,430	)
Cash and cash equivalents at beginning of the year		—			10,482			3,514,736			551,539
Cash and cash equivalents at end of the year		10,482			3,514,736			459,522			72,109

Bank Loans - Summary of Loan Principal Due (Details) - Dec. 31, 2021 ¥ in Thousands, $ in Thousands	CNY (¥)	USD ($)
Secured Longterm Debt Current And Noncurrent [Abstract]
2022	¥ 1,973,392	$ 309,668
2023	551,390	86,525
2024	1,160,896	182,170
2025	1,126,985	176,849
2026 and thereafter	747,736	117,336
Loan principal due	¥ 5,560,399	$ 872,548

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References + Details

Share-Based Payments (Tables)

12 Months Ended

Dec. 31, 2021

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Summary of Assumptions Used to Estimate Fair Value of Share Options Granted

The assumptions used to estimate the fair value of the share options granted during the years ended December 31, 2020 and 2021 are as follows:

	For the year ended December 31,
	2020		2021
Risk-free rate	0.57% – 1.90%		1.31% – 1.82%
Expected volatility range	39.65% – 40.53%		41% – 43%
Exercise multiple		2.80		2.80
Fair value per ordinary share as at valuation dates	US$2.32 – US$14.00		US$4.02 –US$8.27

Summary of Share-based Compensation Expenses Recognized in the Consolidated Statements of Comprehensive (Loss) Income

A summary of share-based compensation expenses recognized in the consolidated statements of comprehensive (loss) income for the years ended December 31, 2019, 2020 and 2021 are as follows:

	2019		2020		2021		2021
	RMB		RMB		RMB		US$
Cost of revenue		—		32,990		6,170		968
Selling and marketing		—		21,691		13,562		2,128
General and administrative		63,746		295,165		100,992		15,848
Total share-based compensation expenses		63,746		349,846		120,724		18,944

2019 Plan

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Summary of Activity

A summary of the activity is stated below:

	Number of share options/ESOP Holdco Class B shares			Weighted average grant date fair value
				US$
Awarded and unvested as of December 31, 2020		9,843,125		1.68
Granted		-		n/a
Vested		(398,553	)		1.56
Forfeited		(112,000	)		1.87
Awarded and unvested as of December 31, 2021		9,332,572			1.68
Expected to vest as of December 31, 2021		9,332,572			1.68

2020 Plan

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Summary of Activity

A summary of the activity under 2020 Plan is stated below:

	Number of share options			Weighted average grant date fair value
				US$
Outstanding as of December 31, 2020*		14,136,509			4.21
Granted		1,350,482			3.17
Exercised		(2,085,515	)		4.31
Forfeited		(949,222	)		4.62
Outstanding as of December 31, 2021*		12,452,254			4.05
Vested and expected to vest as of December 31, 2021		12,452,254			4.05
Exercisable as of December 31, 2021		1,551,155			4.66

* On August 26, 2020, 5,667,164 share options were early exercised with an exercise cash consideration of US$5,667 received by the Company. The Company’s ordinary shares issued for the grantee’s early exercise still remain subject to the existing service and performance vesting conditions. The Company has a right (but not the obligation) to repurchase the vested shares at fair market value, and the unvested shares at the lower of fair market value or the option’s exercise price at any time during a six-month period following the grantee’s termination of services. The Company considered the rights and obligations of the options under this arrangement and concluded that the early exercise of the options was not considered substantive for accounting purposes in accordance with ASC 718-10-55-31, and recorded the proceeds received from early exercise as a liability. As of December 31, 2020 and 2021, 5,667,164 and 4,958,769 early exercised options but not vested remained as outstanding option, respectively.

ISUs

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Summary of Activity

A summary of the ISU activities is stated below:

	Number of ISUs			Weighted average grant date fair value
				US$
Awarded and unvested as of December 31, 2020		385,517			74.78
Granted		18,658			79.32
Vested		(169,361	)		48.02
Forfeited		(22,385	)		124.89
Awarded and unvested as of December 31, 2021		212,429			91.23
Expected to vest as of December 31, 2021		212,429			91.23

Condensed Financial Information of the Parent Company - Condensed Statements of Cash Flows (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2019 CNY (¥)
Condensed Financial Statements Captions [Line Items]
Net cash generated from operating activities	¥ 1,065,505	$ 167,202	¥ 664,910	¥ 40,167
Net cash used in investing activities	(3,952,971)	(620,307)	(2,769,269)	(3,520,639)
Net cash generated from (used in) financing activities	1,293,061	202,909	8,188,802	4,456,328
Effect of exchange rate changes on cash and cash equivalents	(76,056)	(11,936)	(292,820)	(719)
Net increase (decrease) in cash, cash equivalents and restricted cash	(1,670,461)	(262,132)	5,791,623	975,137
Parent Company
Condensed Financial Statements Captions [Line Items]
Net cash generated from operating activities	(6,049)	(949)	(22,553)	(26,093)
Net cash used in investing activities	(2,887,209)	(453,066)	(2,893,144)	(601,174)
Net cash generated from (used in) financing activities	(4,285)	(672)	6,683,039	637,792
Effect of exchange rate changes on cash and cash equivalents	(157,671)	(24,743)	(263,088)	(43)
Net increase (decrease) in cash, cash equivalents and restricted cash	(3,055,214)	(479,430)	3,504,254	10,482
Cash and cash equivalents at beginning of the year	3,514,736	551,539	10,482
Cash and cash equivalents at end of the year	¥ 459,522	$ 72,109	¥ 3,514,736	¥ 10,482

Revenue

12 Months Ended

Dec. 31, 2021

Revenue From Contract With Customer [Abstract]

REVENUE

4. REVENUE

The following table presents the Group’s revenues from contracts with customers disaggregated by material revenue category:

	For the Year Ended December 31,
	2019		2020		2021
	RMB		RMB		RMB		US$
Colocation services recognized over time		678,348		1,701,911		2,649,371		415,744
Colocation rental recognized over time		128,870		124,991		114,681		17,996
Others recognized over time		45,792		4,175		88,225		13,844
		853,010		1,831,077		2,852,277		447,584

- Definition

The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-URI http://asc.fasb.org/topic&trid=49130388

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130551-203045

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 13
-Subparagraph (b)(2)
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130556-203045

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130554-203045

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130550-203045

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130554-203045

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130554-203045

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130554-203045

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130558-203045

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130554-203045

+ Details

Summary of Significant Accounting Policies - Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - Fair Value, Recurring - CNY (¥) ¥ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Quoted Price in Active Markets for Identical assets (Level 1)
Fair Value Assets and Liabilities Measured on Recurring Basis [Line Items]
Short-term investments, Trading securities	¥ 129,946
Short-term investments, Held-to-maturity debt securities	0
Derivative assets	0
Derivative liabilities	0	¥ 0
Contingent receivable		0
Significant Other Observable Inputs (Level 2)
Fair Value Assets and Liabilities Measured on Recurring Basis [Line Items]
Short-term investments, Trading securities	0
Short-term investments, Held-to-maturity debt securities	63,726
Derivative assets	2,446
Derivative liabilities	16,354	24,794
Contingent receivable		0
Significant Unobservable Inputs (Level 3)
Fair Value Assets and Liabilities Measured on Recurring Basis [Line Items]
Short-term investments, Trading securities	0
Short-term investments, Held-to-maturity debt securities	0
Derivative assets	0
Derivative liabilities	¥ 0	0
Contingent receivable		¥ 13,609

Segment Information - Additional Information (Details)	12 Months Ended
Segment Information - Additional Information (Details)	Dec. 31, 2021 Segment
Segment Reporting [Abstract]
Number of reportable segment	1

Short-Term Investment - Summary of Short-Term Investments (Details) ¥ in Thousands, $ in Thousands	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)
Short Term Investments [Line Items]
Short-term investments	¥ 193,672	$ 30,391	¥ 0
Trading Securities
Short Term Investments [Line Items]
Trading securities	129,946	20,391	0
Held-to-maturity Debt Securities
Short Term Investments [Line Items]
Held-to-maturity debt securities	¥ 63,726	$ 10,000	¥ 0

Accumulated Other Comprehensive Income (Loss) - Summary of Accumulated Other Comprehensive Income (Loss) (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2019 CNY (¥)
Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]
Beginning balance	¥ (172,586)		¥ 40,011	¥ 18,044
Foreign currency translation adjustments	(85,391)	$ (13,400)	(212,597)	21,967
Ending balance	¥ (257,977)	$ (40,482)	¥ (172,586)	¥ 40,011

- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

+ References + Details

Related Party Transactions - Summary of Related Party Transactions (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2019 CNY (¥)
Related Party Transaction [Line Items]
Related party transaction, amounts of transaction	¥ 10,541	$ 1,654	¥ 245,755	¥ 224,255
Wangsu
Related Party Transaction [Line Items]
Purchase of services			83,382	104,312
Net revenue from colocation services provided			83,054	95,071
Jizongneng
Related Party Transaction [Line Items]
Purchase of services	¥ 10,541	$ 1,654
Affiliates
Related Party Transaction [Line Items]
Management consulting services provided			59,741	16,434
Shareholder Affiliates
Related Party Transaction [Line Items]
Management consulting services provided			13,016	¥ 8,438
Qinyun
Related Party Transaction [Line Items]
Gain on divestiture			¥ 6,562

Accrued Expenses and Other Current Liabilities

12 Months Ended

Dec. 31, 2021

Accounts Payable And Accrued Liabilities Current [Abstract]

ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES

10. ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES

	As of December 31,
	2020		2021		2021
	RMB		RMB		US$
Payroll payable		48,339		59,432		9,326
Interest payable*		14,639		239,853		37,638
Deferred government grants		8,629		8,629		1,354
Other tax and surcharges payable		28,904		90,011		14,125
Accrued expenses		52,768		42,693		6,699
Others		58,270		70,639		11,085
		211,549		511,257		80,227

* Interest payable balance as of December 31, 2021 includes the incremental interest payable of RMB223,084 (US$35,007), payable upon the maturity of one bank loan in October 2022. As such, the corresponding interest payable was reclassified to current liabilities.

Accrued Expenses and Other Current Liabilities - Summary of Accrued Expenses and Other Current Liabilities (Details) ¥ in Thousands, $ in Thousands	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)
Accounts Payable And Accrued Liabilities Current [Abstract]
Payroll payable	¥ 59,432	$ 9,326	¥ 48,339
Interest payable	239,853	37,638	14,639
Deferred government grants	8,629	1,354	8,629
Other tax and surcharges payable	90,011	14,125	28,904
Accrued expenses	42,693	6,699	52,768
Others	70,639	11,085	58,270
Accrued expenses and other current liabilities	¥ 511,257	$ 80,227	¥ 211,549

Business Combination - Summary of Purchase Consideration on Acquisition Date (Details) - PRC Subsidiary ¥ in Thousands	Apr. 26, 2019 CNY (¥)
Business Acquisition [Line Items]
Cash consideration	¥ 2,785,820
Contingent receivable	(13,503)
Purchase consideration	¥ 2,772,317

Taxation - Schedule of Reconciliation of Differences Between PRC Statutory Tax Rate and Effective Tax Rate for Enterprise Income Tax (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2019 CNY (¥)
Income Tax Expense Benefit Continuing Operations Income Tax Reconciliation [Abstract]
(Loss) income before income tax	¥ 470,836	$ 73,884	¥ (216,006)	¥ (171,443)
Income tax computed at the PRC statutory tax rate of 25%	117,709	18,471	(54,001)	(42,861)
Effect of differing tax rates in different jurisdictions	24,378	3,826	35,228	23,599
Effect of PRC preferential tax rates	(30,191)	(4,738)	(22,350)	(3,346)
Research and development expense super-deduction	(12,232)	(1,919)	(7,557)	(4,001)
Effect of tax rate changes on deferred taxes	(6,446)	(1,012)	5,325
Non-deductible expenses and non-taxable income, net	57,631	9,043	106,892	384
Change in valuation allowance	3,567	560	3,802	24,483
Income tax (benefit) expense	¥ 154,416	$ 24,231	¥ 67,339	¥ (1,742)

Accumulated Other Comprehensive Income (Loss) (Tables)

12 Months Ended

Dec. 31, 2021

Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]

Summary of Accumulated Other Comprehensive Income (Loss)

	RMB
Balance as of January 1, 2019		18,044
Foreign currency translation adjustments, net of tax of nil		21,967
Balance as of December 31, 2019		40,011
Foreign currency translation adjustments, net of tax of nil		(212,597	)
Balance as of December 31, 2020		(172,586	)
Foreign currency translation adjustments, net of tax of nil		(85,391	)
Balance as of December 31, 2021		(257,977	)
Balance as of December 31, 2021, in US$		(40,482	)

Short-Term Investment (Tables)

12 Months Ended

Dec. 31, 2021

Short Term Investments [Abstract]

Summary of Short-Term Investments

	As of December 31,
	2020		2021		2021
	RMB		RMB		US$
Trading securities		—		129,946		20,391
Held-to-maturity debt securities		—		63,726		10,000
		—		193,672		30,391

Restricted Net Assets

12 Months Ended

Dec. 31, 2021

Disclosure Of Restricted Net Assets [Abstract]

RESTRICTED NET ASSETS

18. RESTRICTED NET ASSETS

The Company’s ability to pay dividends is primarily dependent on the Company receiving distributions of funds from its subsidiaries. Relevant PRC statutory laws and regulations permit payments of dividends by the Group’s PRC subsidiaries only out of their retained earnings, if any, as determined in accordance with PRC accounting standards and regulations. The results of operations reflected in the consolidated financial statements prepared in accordance with U.S. GAAP differ from those reflected in the statutory financial statements of the Company’s PRC subsidiaries.

In accordance with the Regulations on Enterprises with Foreign Investment of China and their Articles of Association, the Company’s wholly foreign-owned enterprises, being foreign invested enterprise established in the PRC, are required to allocate at least 10% of their after-tax profit determined based on the PRC accounting standards and regulations to the general reserve until the reserve has reached 50% of the relevant subsidiary’s registered capital. Appropriations to the staff welfare and bonus fund are at the discretion of the Company’s wholly foreign-owned enterprises. These reserves can only be used for specific purposes and are not transferable to the Company in the form of loans, advances, or cash dividends.

In accordance with the PRC Company Laws, the VIEs must make appropriations from their annual after-tax profits as reported in their PRC statutory accounts to non-distributable reserve funds, namely statutory reserve and discretionary surplus reserve. The VIEs are required to allocate at least 10% of their after-tax profits to the statutory reserve until such fund has reached 50% of their respective registered capital. Appropriation to discretionary surplus reserve is at the discretion of the VIEs. These reserves can only be used for specific purposes and are not transferable to the Company in the form of loans, advances, or cash dividends.

As of December 31, 2021, the Group’s PRC subsidiaries and VIEs had appropriated RMB189,700 (US$29,768) to their reserves.

Furthermore, registered share capital and capital reserve accounts of the Company’s PRC subsidiaries and the VIEs are also restricted from distribution. As a result, the restrictions amounted to approximately RMB3,837,898 (US$602,250) as of December 31, 2021. Therefore, in accordance with Rules 504 and 4.08(e)(3) of Regulation S-X, the condensed parent company only financial statements are disclosed in Note 21.

Cash transfers from the Company’s PRC subsidiaries to its subsidiaries outside of China are subject to PRC government control of currency conversion. Shortages in the availability of foreign currency may restrict the ability of the PRC subsidiaries and the VIEs to remit sufficient foreign currency to pay dividends or other payments to the Company, or otherwise satisfy their foreign currency denominated obligations.

Loss (Earnings) Per Share (Tables)

12 Months Ended

Dec. 31, 2021

Earnings Per Share [Abstract]

Summary of Basic and Diluted (Loss) Earnings Per Share

Basic and diluted (loss) earnings per share for each of the years presented are calculated as follows:

	For the year ended December 31,
	2019			2020						2021
	Ordinary shares			Class A			Class B			Class A				Class B
	RMB			RMB			RMB			RMB		US$		RMB			US$
(Loss) Earnings per share-basic:
Numerator:
Allocation of net (loss) income available to ordinary shareholders		(174,443	)		(105,403	)		(177,942	)		153,692		24,118		162,728			25,535
Denominator:
Weighted average number of ordinary shares outstanding		397,153,121			228,284,218			385,389,358			352,642,396		352,642,396		373,375,848			373,375,848
Denominator used for (loss) earnings per share		397,153,121			228,284,218			385,389,358			352,642,396		352,642,396		373,375,848			373,375,848
(Loss) Earnings per share-basic		(0.44	)		(0.46	)		(0.46	)		0.44		0.07		0.44			0.07

(Loss) Earnings per share-diluted:
Numerator:
Allocation of net (loss) income available to ordinary shareholders		(174,443	)		(105,403	)		(177,942	)		153,692		24,118		162,728			25,535
Reallocation of net (loss) income available to ordinary shares as a result of conversion of Class B to Class A ordinary shares		—			(177,942	)		—			162,728		25,535		—			—
Reallocation of net (loss) income to Class B ordinary shares		—			—			—			—		—		(108	)		(17	)
Net (loss) income available to ordinary shareholders		(174,443	)		(283,345	)		(177,942	)		316,420		49,653		162,620			25,518
Denominator:
Weighted average number of ordinary shares outstanding		397,153,121			228,284,218			385,389,358			352,642,396		352,642,396		373,375,848			373,375,848
Share-based awards		—			—			—			1,705,149		1,705,149		1,291,857			1,291,857
Conversion of Class B including potential ordinary shares to Class A ordinary share		—			385,389,358			—			374,667,705		374,667,705		—			—
Denominator used for (loss) earnings per share		397,153,121			613,673,576			385,389,358			729,015,250		729,015,250		374,667,705			374,667,705
(Loss) Earnings per share-diluted		(0.44	)		(0.46	)		(0.46	)		0.43		0.07		0.43			0.07

Segment Information (Table)

12 Months Ended

Dec. 31, 2021

Segment Reporting [Abstract]

Summary of Net Revenues by Geographic Area

Net revenues by geographic area are based upon the location of the customers. Total net revenues by geographic area are presented as follows:

	For the year ended December 31,
	2019		2020		2021		2021
	RMB		RMB		RMB		US$
PRC		712,115		1,706,086		2,737,596		429,588
Malaysia		140,895		124,991		114,681		17,996
		853,010		1,831,077		2,852,277		447,584

Summary of Long-lived Assets by Geographic Area

Long-lived assets by geographic area are presented as follows:

	As of December 31,
	2020		2021		2021
	RMB		RMB		US$
PRC		6,016,479		8,829,539		1,385,547
Malaysia		958,408		911,623		143,054
India		229,241		626,798		98,359
		7,204,128		10,367,960		1,626,960

Organization - Schedule of Assets Liabilities and Result of Operations and Cash Flow of VIEs (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2021 USD ($)
Current assets
Cash and cash equivalents	¥ 4,390,293		¥ 6,705,612	¥ 1,038,897	$ 688,933
Short-term investments	193,672		0		30,391
Accounts receivable, net	661,027		422,224		103,730
Value added taxes recoverable	327,553		182,982		51,400
Amount due from related parties	0		64,093		0
Prepayments and other current assets	314,604		112,467		49,368
Total current assets	6,347,323		7,589,976		996,033
Non-current assets
Property and equipment, net	9,427,591		6,423,830		1,479,395
Operating lease right-of-use assets	803,544		635,683		126,094
Finance lease right-of use assets	136,825		144,615		21,471
Intangible assets	305,800		320,299		47,987
Deferred tax assets	30,866		18,789		4,844
Other non-current assets	342,573		193,145		53,755
Total non-current assets	12,334,628		8,669,622		1,935,572
Total assets	18,681,951		16,259,598		2,931,605
Current liabilities
Accounts payable	1,701,299		1,186,030		266,971
Current portion of operating lease liabilities	45,501		40,131		7,140
Total current liabilities	4,301,347		1,832,940		674,975
Non-current liabilities
Operating lease liabilities	198,806		204,305		31,197
Deferred tax liabilities	270,950		254,431		42,518
Other non-current liabilities	196,400		260,225		30,819
Total non-current liabilities	4,265,972		4,687,190		669,424
Total liabilities	8,567,319		6,520,130		1,344,399
Total revenue	2,852,277	$ 447,584	1,831,077	853,010
Net (loss) income	316,420	49,653	(283,345)	(169,701)
Net cash generated from operating activities	1,065,505	167,202	664,910	40,167
Net cash used in investing activities	(3,952,971)	(620,307)	(2,769,269)	(3,520,639)
Net cash used in financing activities	1,293,061	202,909	8,188,802	4,456,328
VIEs
Current assets
Cash and cash equivalents	577,753		251,589		90,662
Short-term investments	129,946		0		20,391
Accounts receivable, net	588,518		399,451		92,351
Amounts due from subsidiaries of the Group	621,276		229,845		97,492
Value added taxes recoverable	4,273		3,367		671
Amount due from related parties	0		35		0
Prepayments and other current assets	5,931		5,715		931
Total current assets	1,927,697		890,002		302,498
Non-current assets
Property and equipment, net	57,832		64,727		9,075
Operating lease right-of-use assets	221,708		239,155		34,791
Finance lease right-of use assets	866		0		136
Intangible assets	17,797		20,251		2,793
Amounts due from subsidiaries of the Group	300,000		300,000		47,077
Deferred tax assets	0		10,598		0
Other non-current assets	10,114		8,783		1,587
Total non-current assets	608,317		643,514		95,459
Total assets	2,536,014		1,533,516		397,957
Current liabilities
Accounts payable	40,260		31,694		6,318
Income taxes payable	4,184		1,288		657
Amounts due to subsidiaries of the Group	2,111,460		1,124,418		331,334
Current portion of operating lease liabilities	¥ 35,990		¥ 38,054		$ 5,648
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Current portion of operating lease liabilities		Current portion of operating lease liabilities		Current portion of operating lease liabilities
Accrued expenses and other current liabilities	¥ 34,044		¥ 31,231		$ 5,342
Total current liabilities	2,225,938		1,226,685		349,299
Non-current liabilities
Operating lease liabilities	¥ 188,104		¥ 204,305		$ 29,518
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Operating lease liabilities		Operating lease liabilities		Operating lease liabilities
Deferred tax liabilities	¥ 499		¥ 3,131		$ 78
Other non-current liabilities	8,127		4,977		1,275
Total non-current liabilities	196,730		212,413		30,871
Total liabilities	2,422,668		1,439,098		$ 380,170
Total revenue	2,656,005	416,785	1,706,086	712,115
Net (loss) income	2,942	462	(52,771)	29
Net cash generated from operating activities	460,676	72,290	184,998	93,468
Net cash used in investing activities	(133,441)	(20,940)	(12,115)	(14,762)
Net cash used in financing activities	¥ (1,071)	$ (168)	¥ 0	¥ 0

Organization (Tables)

12 Months Ended

Dec. 31, 2021

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Schedule of Principal Subsidiaries Variable Interest Entities and Subsidiaries of Variable Interest Entities

As of December 31, 2021, the Company’s principal subsidiaries, variable interest entities, and subsidiaries of the variable interest entities, are as follows:

Name	Date of establishment/ acquisition	Place of establishment	Percentage of equity interest attributable to the Company			Principal activities
Stack Midco Limited	November 27, 2018	Cayman		100	%	Investment holding
Suzhou Stack Data Technology Company Limited (“Suzhou Stack”)*	December 10, 2018	PRC		100	%	Provision of technical and consulting services
Hebei Stack Data Technology Company Limited (“Hebei Stack”)*	July 10, 2019	PRC		100	%	Provision of technical and consulting services
Chindata (Xiamen) Science and Technology Co., Ltd.	April 26, 2019	PRC		100	%	Provision of technical and consulting services
Chindata (Hebei) Co., Ltd.	April 26, 2019	PRC		100	%	Provision of technical and consulting services
Datong Qinhuai Data Company Limited	April 26, 2019	PRC		100	%	Provision of technical and consulting services
Bridge Data Centres Malaysia Sdn Bhd	November 1, 2017	Malaysia		100	%	Provision of IDC colocation rental services
Variable interest entities:
Sitan (Beijing) Data Technology Company Limited (“Beijing Sitan”)	December 19, 2018	PRC	Nil			Provision of IDC colocation services
Hebei Qinshu Information Technology Company Limited (“Hebei Qinshu”)	July 10, 2019	PRC	Nil			Provision of IDC colocation services
Variable interest entities’ subsidiaries:
Chindata (Beijing) Co., Ltd.	April 26, 2019	PRC	Nil			Provision of IDC colocation services
Sidake Hebei Data Technology Company Limited	April 26, 2019	PRC	Nil			Provision of IDC colocation services
Datong Sitan Data Science and Technology Co., Ltd.	April 26, 2019	PRC	Nil			Provision of IDC colocation services
Chindata (Shenzhen) Co., Ltd.	April 26, 2019	PRC	Nil			Provision of IDC colocation services

*	each or collectively referred to as the “WFOE”.

Schedule of Assets Liabilities and Result of Operations and Cash Flow of VIEs

	As of December 31,
	2020		2021		2021
	RMB		RMB		US$
Current assets
Cash and cash equivalents		251,589		577,753		90,662
Short-term investments		—		129,946		20,391
Accounts receivable, net		399,451		588,518		92,351
Amounts due from subsidiaries of the Group		229,845		621,276		97,492
Value added taxes recoverable		3,367		4,273		671
Amounts due from related parties		35		—		—
Prepayments and other current assets		5,715		5,931		931
Total current assets		890,002		1,927,697		302,498
Non-current assets
Property and equipment, net		64,727		57,832		9,075
Operating lease right-of-use assets		239,155		221,708		34,791
Finance lease right-of-use assets		—		866		136
Intangible assets		20,251		17,797		2,793
Amounts due from subsidiaries of the Group		300,000		300,000		47,077
Deferred tax assets		10,598		—		—
Other non-current assets		8,783		10,114		1,587
Total non-current assets		643,514		608,317		95,459
Total assets		1,533,516		2,536,014		397,957
Current liabilities
Accounts payable		31,694		40,260		6,318
Income taxes payable		1,288		4,184		657
Amounts due to subsidiaries of the Group		1,124,418		2,111,460		331,334
Current portion of operating lease liabilities		38,054		35,990		5,648
Accrued expenses and other current liabilities		31,231		34,044		5,342
Total current liabilities		1,226,685		2,225,938		349,299
Non-current liabilities
Operating lease liabilities		204,305		188,104		29,518
Deferred tax liabilities		3,131		499		78
Other non-current liabilities		4,977		8,127		1,275
Total non-current liabilities		212,413		196,730		30,871
Total liabilities		1,439,098		2,422,668		380,170

	For the year ended December 31,
	2019			2020			2021			2021
	RMB			RMB			RMB			US$
Revenue		712,115			1,706,086			2,656,005			416,785
Net income (loss)		29			(52,771	)		2,942			462
Net cash generated from operating activities		93,468			184,998			460,676			72,290
Net cash used in investing activities		(14,762	)		(12,115	)		(133,441	)		(20,940	)
Net cash used in financing activities		—			—			(1,071	)		(168	)

- Definition

Tabular disclosure of the significant judgments and assumptions made in determining whether a variable interest (as defined) held by the entity requires the variable interest entity (VIE) (as defined) to be consolidated and (or) disclose information about its involvement with the VIE, individually or in aggregate (as applicable); the nature of restrictions, if any, on the consolidated VIE's assets and on the settlement of its liabilities reported by an entity in its statement of financial position, including the carrying amounts of such assets and liabilities; the nature of, and changes in, the risks associated with involvement in the VIE; how involvement with the VIE affects the entity's financial position, financial performance, and cash flows; the lack of recourse if creditors (or beneficial interest holders) of the consolidated VIE have no recourse to the general credit of the primary beneficiary (if applicable); the terms of arrangements, giving consideration to both explicit arrangements and implicit variable interests, if any, that could require the entity to provide financial support to the VIE, including events or circumstances that could expose the entity to a loss; the methodology used by the entity for determining whether or not it is the primary beneficiary of the variable interest entity; the significant factors considered and judgments made in determining that the power to direct the activities of a VIE that most significantly impact the VIE's economic performance are shared (as defined); the carrying amounts and classification of assets and liabilities of the VIE included in the statement of financial position; the entity's maximum exposure to loss, if any, as a result of its involvement with the VIE, including how the maximum exposure is determined and significant sources of the entity's exposure to the VIE; a comparison of the carrying amounts of the assets and liabilities and the entity's maximum exposure to loss; information about any liquidity arrangements, guarantees, and (or) other commitments by third parties that may affect the fair value or risk of the entity's variable interest in the VIE; whether or not the entity has provided financial support or other support (explicitly or implicitly) to the VIE that it was not previously contractually required to provide or whether the entity intends to provide that support, including the type and amount of the support and the primary reasons for providing the support; and supplemental information the entity determines necessary to provide.

+ References + Details

Condensed Financial Information of the Parent Company - Condensed Statements of Comprehensive (Loss) Income (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2019 CNY (¥)
Operating expenses
Sales and marketing expenses	¥ 89,654	$ 14,069	¥ 99,092	¥ 47,496
General and administrative expenses	359,470	56,409	564,286	232,837
Total operating expenses	(524,468)	(82,301)	(704,553)	(304,843)
Operating (loss) income	675,145	105,944	28,228	(62,054)
Interest income	58,607	9,197	27,616	7,161
Interest expense	(294,978)	(46,288)	(238,384)	(102,290)
Foreign currency exchange (loss) gain	(4,726)	(742)	(3,548)	(2,438)
Changes in fair value of financial instruments	12,605	1,978	(12,717)	(11,189)
Other comprehensive income (loss) (foreign currency translation adjustments), net of tax of nil:	(85,391)	(13,400)	(212,597)	21,967
Comprehensive (loss) income	231,029	36,253	(495,942)	(147,734)
Parent Company
Operating expenses
Sales and marketing expenses	(235)	(37)
General and administrative expenses	(19,900)	(3,123)	(53,945)	(33,523)
Total operating expenses	(20,135)	(3,160)	(53,945)	(33,523)
Operating (loss) income	(20,135)	(3,160)	(53,945)	(33,523)
Interest income	5,200	816	1,854
Interest expense				47
Share of (loss) income of subsidiaries and the VIEs	318,481	49,977	(232,287)	(140,967)
Foreign currency exchange (loss) gain	89	14	(1,193)
Changes in fair value of financial instruments	4,465	701
Others, net	8,320	1,306	2,226
Net (loss) income attributable to ordinary shareholders	316,420	49,654	(283,345)	(174,443)
Other comprehensive income (loss) (foreign currency translation adjustments), net of tax of nil:	(85,391)	(13,400)	(212,597)	21,967
Comprehensive (loss) income	¥ 231,029	$ 36,254	¥ (495,942)	¥ (152,476)

Commitments and Contingencies - Additional Information (Details) - 12 months ended Dec. 31, 2021 ¥ in Thousands, $ in Thousands	CNY (¥)	USD ($)	USD ($)
Commitments And Contingencies Disclosure [Line Items]
Capital expenditure commitments	¥ 841,550	$ 132,058
Construction contract termination date	August 2020	August 2020
Others, Net
Commitments And Contingencies Disclosure [Line Items]
Loss contingency accrual	¥ 31,162		$ 4,890
Minimum
Commitments And Contingencies Disclosure [Line Items]
Capital expenditure commitments, period	1 year	1 year
Maximum
Commitments And Contingencies Disclosure [Line Items]
Capital expenditure commitments, period	2 years	2 years

Bank Loans (Tables)

12 Months Ended

Dec. 31, 2021

Secured Longterm Debt Current And Noncurrent [Abstract]

Summary of Group's Borrowings

The Group’s borrowings consisted of the following:

	As of December 31,
	2020		2021		2021
	RMB		RMB		US$
Secured short-term bank loans		66,135		260,980		40,953
Secured long-term bank loans		4,122,898		5,216,005		818,505
		4,189,033		5,476,985		859,458

Summary of Loan Principal Due

As of December 31, 2021, the loan principal will be due according to the following schedule:

	RMB		US$
2022		1,973,392		309,668
2023		551,390		86,525
2024		1,160,896		182,170
2025		1,126,985		176,849
2026 and thereafter		747,736		117,336
		5,560,399		872,548

Property and Equipment - Additional Information (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2019 CNY (¥)
Property Plant And Equipment [Abstract]
Depreciation expense	¥ 543,597	$ 85,302	¥ 369,686	¥ 208,415

Taxation - Additional Information (Details) $ in Thousands	12 Months Ended
Taxation - Additional Information (Details) $ in Thousands	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2021 USD ($)
Tax Credit Carryforward [Line Items]
Statutory income tax rate	25.00%	25.00%	25.00%	25.00%
Preferential income tax rate	15.00%	15.00%
Effective period of certificate	3 years	3 years
Withholding income tax rate	10.00%	10.00%
Undistributed earnings	¥ 1,023,628,000				$ 160,630
Impact from tax uncertainties			¥ 0	¥ 0
Income tax examination, description	In general, the tax authorities have five to seven years to conduct examinations of the tax filings of the Group’s subsidiaries.	In general, the tax authorities have five to seven years to conduct examinations of the tax filings of the Group’s subsidiaries.
Income tax examination years under examination	2016 2017 2018 2019 2020 2021	2016 2017 2018 2019 2020 2021
Unrecognized tax benefits	¥ 63,643,000		¥ 4,478,000		9,987
Deferred tax assets related to tax loss carry forwards	63,643,000				9,987
Interest expense on unrecognized tax benefits	2,729,000	$ 428
Accrued interest expense on unrecognized tax benefits	¥ 3,288,000				516
Earliest Tax Year
Tax Credit Carryforward [Line Items]
Time period that tax authorities could conduct examinations of entity tax filings	5 years	5 years
Latest Tax Year
Tax Credit Carryforward [Line Items]
Time period that tax authorities could conduct examinations of entity tax filings	7 years	7 years
PRC and Malaysia
Tax Credit Carryforward [Line Items]
Operating loss	¥ 362,461,000				$ 56,878
PRC
Tax Credit Carryforward [Line Items]
Tax losses carry forward duration	5 years	5 years
Tax loss carry forward extended duration	10 years	10 years
Operating loss carryforwards expiration year	2023	2023
Malaysia
Tax Credit Carryforward [Line Items]
Tax losses carry forward duration	7 years	7 years
Operating loss carryforwards expiration year	2024	2024
Malaysia
Tax Credit Carryforward [Line Items]
Statutory income tax rate	24.00%	24.00%

Consolidated Statements of Changes in Shareholders' Equity
¥ in Thousands, $ in Thousands

CNY (¥)

USD ($)

Ordinary Shares

CNY (¥)

Ordinary Shares

USD ($)

Additional Paid-In Capital

CNY (¥)

Additional Paid-In Capital

USD ($)

Statutory Reserves

CNY (¥)

Statutory Reserves

USD ($)

Accumulated Other Comprehensive Income (Loss)

CNY (¥)

Accumulated Other Comprehensive Income (Loss)

USD ($)

Accumulated Deficit

CNY (¥)

Accumulated Deficit

USD ($)

Total Chindata Group Holdings Limited Shareholders' Equity

CNY (¥)

Total Chindata Group Holdings Limited Shareholders' Equity

USD ($)

Non-Controlling Interests

CNY (¥)

Beginning Balance at Dec. 31, 2018

¥ 675,891

¥ 8

¥ 798,559

¥ 18,044

¥ (140,720)

¥ 675,891

Beginning balance, shares at Dec. 31, 2018 | shares

168,092,123

Net (loss) income

(169,701)

(174,443)

¥ 4,742

Issuance of ordinary shares

2,345,270

¥ 23

2,345,247

2,345,270

Issuance of ordinary shares, shares | shares

370,288,533

Capital contribution from non-controlling interests of a subsidiary

^[1]

300,000

Purchase of non-controlling interests

^[1]

¥ 3

304,739

304,742

¥ (304,742)

Purchase of non-controlling interests, shares | shares

^[1]

28,335,824

Share-based compensation (Note 13)

63,746

Appropriation of statutory reserves

¥ 13,908

(13,908)

Other comprehensive income (loss)

21,967

Ending Balance at Dec. 31, 2019

3,237,173

¥ 34

3,512,291

13,908

40,011

(329,071)

3,237,173

Ending balance, shares at Dec. 31, 2019 | shares

566,716,480

Net (loss) income

(283,345)

Issuance of ordinary shares

1,769,645

¥ 4

1,769,641

1,769,645

Issuance of ordinary shares, shares | shares

46,075,737

Share issuance upon the initial public offering ("IPO") and concurrent private placements, net of issuance costs, shares

4,858,617

¥ 8

4,858,609

4,858,617

Share issuance upon the initial public offering ("IPO") and concurrent private placements, net of issuance costs, shares | shares

112,000,000

Share-based compensation (Note 13)

369,975

Appropriation of statutory reserves

68,884

(68,884)

Other comprehensive income (loss)

(212,597)

Ending Balance at Dec. 31, 2020

9,739,468

¥ 46

10,510,516

82,792

(172,586)

(681,300)

9,739,468

Ending Balance (Accounting Standards Update 2016-13) at Dec. 31, 2020

8,323

Ending balance, shares at Dec. 31, 2020 | shares

724,792,217

Net (loss) income

316,420

$ 49,653

316,420

Share-based compensation (Note 13)

119,047

Exercise of share options

16,765

Exercise of share options, shares | shares

2,085,515

Appropriation of statutory reserves

106,908

(106,908)

Other comprehensive income (loss)

(85,391)

Ending Balance at Dec. 31, 2021

¥ 10,114,632

$ 1,587,206

¥ 46

$ 7

¥ 10,646,328

$ 1,670,641

¥ 189,700

$ 29,768

¥ (257,977)

$ (40,482)

¥ (463,465)

$ (72,728)

¥ 10,114,632

$ 1,587,206

Ending balance, shares at Dec. 31, 2021 | shares

726,877,732

[1]

On March 14, 2019, the non-controlling interests made a pro-rata contribution to a subsidiary of the Group. In July 2019, the Company subsequently repurchased this outstanding non-controlling interests through the issuance of ordinary shares amounting to US$44,118. The acquisition of the non-controlling interests by the Company was accounted for as an equity transaction. The difference between the consideration transferred and the carrying amount of the non-controlling interests is recognized as an adjustment to additional paid-in capital.

Goodwill

12 Months Ended

Dec. 31, 2021

Goodwill And Intangible Assets Disclosure [Abstract]

GOODWILL

9. GOODWILL

	Stack Group
Balance as of January 1, 2020		466,320
Goodwill acquired (Note 17)		6,563
Balance as of December 31, 2020 and 2021		472,883
Balance as of December 31, 2021 (US$)		74,206

For the years ended December 31, 2019, 2020 and 2021, the Group performed a qualitative assessment and quantitative test based on the requirements of ASC 350-20. The Group evaluated all relevant factors including, but not limited to, macroeconomic conditions, industry and market conditions and financial performance. The Group weighed all factors in their entirety and concluded that it was not more-likely-than-not the fair value was less than the carrying amount of the reporting unit, and further impairment testing on goodwill was unnecessary.

Segment Information

12 Months Ended

Dec. 31, 2021

Segment Reporting [Abstract]

SEGMENT INFORMATION

20. SEGMENT INFORMATION

The Group has one segment. Its CODM is the Board of Directors, who makes operating decisions, assesses performance and allocates resources on a consolidated basis.

Net revenues by geographic area are based upon the location of the customers. Total net revenues by geographic area are presented as follows:

	For the year ended December 31,
	2019		2020		2021		2021
	RMB		RMB		RMB		US$
PRC		712,115		1,706,086		2,737,596		429,588
Malaysia		140,895		124,991		114,681		17,996
		853,010		1,831,077		2,852,277		447,584

Long-lived assets by geographic area are presented as follows:

	As of December 31,
	2020		2021		2021
	RMB		RMB		US$
PRC		6,016,479		8,829,539		1,385,547
Malaysia		958,408		911,623		143,054
India		229,241		626,798		98,359
		7,204,128		10,367,960		1,626,960

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 31
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8924-108599

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8981-108599

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8721-108599

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 40
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9031-108599

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599

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+ Details

Related Party Transactions (Tables)

12 Months Ended

Dec. 31, 2021

Summary of Related Party Transactions

The Group had the following related party transactions, except for transactions disclosed in other notes:

	For the year ended December 31,
	2019		2020		2021		2021
	RMB		RMB		RMB		US$
Purchase of services from Wangsu*		104,312		83,382		—		—
Purchase of services from Jizongneng**		—		—		10,541		1,654
Net revenue from colocation services provided to Wangsu***		95,071		83,054		—		—
Management consulting services provided by Affiliates****		16,434		59,741		—		—
Management consulting services provided by Shareholder Affiliates****		8,438		13,016		—		—
Gain on divestiture of Qinyun and related assets*****		—		6,562		—		—
		224,255		245,755		10,541		1,654

**	Utility purchased from Jizongneng for the Group’s IDC colocation services business was recognized as cost of revenues.

***

****	In connection with the IPO, the Company recognized a one-time consulting agreements’ termination expense amounting to RMB50,000 and RMB11,000, payable in cash to the Affiliates and the Shareholder Affiliates, respectively.

*****

Summary of Related Party Balances

The Group had the following related party balances at the end of the year:

	As of December 31,
	2020		2021		2021
	RMB		RMB		US$
Amounts due from related parties:
Company Affiliates		64,093		—		—
Amounts due to related parties:
Company Affiliates		—		6,754		1,060
Affiliates		490		478		75
Shareholder Affiliates		36,978		31,600		4,959
		37,468		38,832		6,094

Business Combination - Additional Information (Details) ¥ in Thousands, $ in Thousands			12 Months Ended
	Nov. 01, 2020 CNY (¥)	Apr. 26, 2019 CNY (¥)	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2019 CNY (¥)
PRC Subsidiary
Business Acquisition [Line Items]
Date of acquisition		Apr. 26, 2019
Percentage of ownership interests acquired		100.00%
Remeasurement gain of profit or loss			¥ 5,884	$ 923	¥ 7,762	¥ 1,127
Settlement			¥ 19,493	$ 3,059
Estimated remaining useful life of identifiable intangible assets			10 years	10 years
Pro forma revenue						1,098,383
Pro forma net loss attributable to the Company						¥ 141,745
Purchase consideration		¥ 2,772,317
PRC Subsidiary \| Maximum
Business Acquisition [Line Items]
Purchase price consideration on predetermined performance targets		¥ 48,000
Huailai Huizhi Construction Co. Ltd.
Business Acquisition [Line Items]
Date of acquisition	Nov. 01, 2020
Percentage of ownership interests acquired	100.00%
Purchase consideration	¥ 39,612

Related Party Transactions - Summary of Related Party Transactions (Parenthetical) (Details) - CNY (¥) ¥ in Thousands		8 Months Ended	9 Months Ended	12 Months Ended
	Aug. 04, 2020	Dec. 31, 2019	Oct. 02, 2020	Dec. 31, 2020
Related Party Transaction [Line Items]
Services revenue		¥ 70,861	¥ 62,440
Equity interest	100.00%
Purchase consideration transferred related to disposal of subsidiary	¥ 64,000
Gain resulting from assets transfer	¥ 6,562
Former Chief Executive Officer
Related Party Transaction [Line Items]
Percentage of transfer of consideration	99.90%
Third Party
Related Party Transaction [Line Items]
Percentage of transfer of consideration	0.10%
Cash Affiliates
Related Party Transaction [Line Items]
Termination expenses				¥ 50,000
Shareholder Affiliates
Related Party Transaction [Line Items]
Termination expenses				¥ 11,000

Related Party Transactions - Summary of Related Party Balances (Details) ¥ in Thousands, $ in Thousands	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)
Amounts due from related parties:
Company Affiliates			¥ 64,093
Amounts due to related parties:
Company Affiliates	¥ 6,754	$ 1,060
Affiliates	478	75	490
Shareholder Affiliates	31,600	4,959	36,978
Total	¥ 38,832	$ 6,094	¥ 37,468

- Definition

For an unclassified balance sheet, amounts due from related parties including affiliates, employees, joint ventures, officers and stockholders, immediate families thereof, and pension funds.

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- Definition

Carrying amount as of the balance sheet date of obligations due all related parties. For classified balance sheets, represents the current portion of such liabilities (due within one year or within the normal operating cycle if longer).

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+ Details

Share-Based Payments - Additional Information (Details) $ / shares in Units, ¥ in Thousands, $ in Thousands								1 Months Ended				12 Months Ended
	Sep. 30, 2020 CNY (¥) shares	Aug. 26, 2020 USD ($) shares	Aug. 18, 2020 CNY (¥)	Aug. 18, 2020 USD ($)	May 29, 2020 shares	Apr. 13, 2020 shares	Sep. 11, 2019 Installment shares	Oct. 31, 2020 shares	Sep. 30, 2020 CNY (¥) shares	May 31, 2020 Installment shares	Dec. 31, 2019	Dec. 31, 2021 CNY (¥) shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 CNY (¥)	Dec. 31, 2020 USD ($) $ / shares shares	Dec. 31, 2019 CNY (¥)	Jan. 08, 2020 shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total share-based compensation expenses												¥ 120,724	$ 18,944	¥ 349,846		¥ 63,746
Proceeds from exercise of share options												¥ 10,449	$ 1,640
Construction in Progress
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total share-based compensation expenses \| ¥														¥ 20,127
BCPE Bridge Cayman, L.P. \| Pre IPO Private Placements
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of shareholding			21.81%	21.81%
Amount to be distributed to ISU holders			¥ 210,986	$ 30,500
Class B Ordinary Shares \| BCPE Bridge Limited Partnership Agreement
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Conversion of outstanding shares								26,797,650
2019 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted-average exercise price for forfeited share options \| $ / shares													$ 0.50
Weighted-average grant-date fair value of the share options granted \| $ / shares															$ 1.73
Total fair value of share options vested \| $													$ 620		$ 13,923
Weighted-average exercise price for share options forfeited \| $ / shares													$ 1.87
Weighted-average exercise price for share options outstanding \| $ / shares													1.68		$ 1.68
Weighted-average exercise price for share options expected to vest \| $ / shares													$ 1.68
2020 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based payment award, options, exercised		5,667,164										2,085,515	2,085,515
Total share-based compensation expenses \| ¥									¥ 21,914
Number of shares vesting accelerated									1,125,600
Weighted-average exercise price for forfeited share options \| $ / shares													$ 4.62
Weighted-average grant-date fair value of the share options granted \| $ / shares													$ 3.17		$ 5.43
Total fair value of share options vested \| $													$ 8,258		$ 7,846
Stock option granted contractual term										10 years
Number of shares granted					5,667,164							1,350,482	1,350,482
Stock option vesting percentage										50.00%
Number of Equal Installments to Vest Shares \| Installment										2
Proceeds from exercise of share options \| $		$ 5,667
Number of early exercised options but not vested remained as outstanding option													4,958,769		5,667,164
Weighted-average exercise price for share options granted \| $ / shares													$ 3.42
Weighted-average exercise price for share options exercised \| $ / shares													1.25
Weighted-average exercise price for share options forfeited \| $ / shares													1.92
Weighted-average exercise price for share options outstanding \| $ / shares													1.69		$ 1.47
Weighted-average exercise price for share options expected to vest \| $ / shares													1.69
Weighted-average exercise price for share options exercisable \| $ / shares													$ 1.82
Total intrinsic value of options exercised \| $													$ 4,282
Aggregate intrinsic value of share options outstanding \| $													20,385
Aggregate intrinsic value of share options currently exercisable \| $													$ 2,356
Weighted-average remaining contractual term of share options outstanding												8 years 6 months 10 days	8 years 6 months 10 days
Weighted-average remaining contractual term of share options currently exercisable												8 years 8 months 19 days	8 years 8 months 19 days
2020 Plan \| Certain Employees
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares granted								2,805,000	5,666,345			1,350,482	1,350,482
Stock option vesting service period								4 years
2020 Plan \| Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Aggregate number of shares authorized	11,334,328								11,334,328	5,667,164					22,291,218
2020 Plan \| Maximum \| Certain Employees
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock option vesting service period												4 years	4 years
2020 Plan \| Minimum \| Certain Employees
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock option vesting service period												3 years	3 years
2020 Plan \| Service-based Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock option vesting percentage										50.00%
Number of Equal Installments to Vest Shares \| Installment										4
Stock option vesting service period										4 years
2019 Plan and 2020 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total unrecognized employee share-based compensation expenses \| $													$ 44,440
Expected to recognized weighted-average period												1 year 5 months 12 days	1 year 5 months 12 days
ISUs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected to recognized weighted-average period												1 year 2 months 12 days	1 year 2 months 12 days
Total unrecognized employee share-based compensation expenses \| $													$ 13,624
Class B \| BCPE Bridge Limited Partnership Agreement
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share issued to SBC platform								1,000,000
BCPE Stack ESOP Holdco Limited \| 2019 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total share-based compensation expenses \| ¥	¥ 27,580
Number of shares vesting accelerated	3,808,818
BCPE Bridge Cayman, L.P. \| Class B
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total share-based compensation expenses \| ¥	¥ 5,132
Number of shares vesting accelerated	31,137
Number of shares issued							1,000,000
BCPE Bridge Cayman, L.P. \| Class B \| Granted During 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of vesting installments of remaining portion \| Installment							2
BCPE Bridge Cayman, L.P. \| Class B \| Maximum \| Granted During 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Service vesting period							5 years
BCPE Bridge Cayman, L.P. \| Class B \| Maximum \| Granted During 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Service vesting period							4 years
Number of vesting installments \| Installment							4
BCPE Bridge Cayman, L.P. \| Class B \| Minimum \| Granted During 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Service vesting period							1 year
BCPE Bridge Cayman, L.P. \| Class B \| Minimum \| Granted During 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Service vesting period							3 years
Number of vesting installments \| Installment							3
2019 Plan \| BCPE Stack ESOP Holdco Limited
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
ESOP contractual term											10 years
2019 Plan \| BCPE Stack ESOP Holdco Limited \| Class B
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
ESOP purchase options																	17,633,120
Share-based payment award, options, exercised						17,633,120
Number of shares exchanged for ordinary shares													3,873,613

Taxation - Summary of (Loss) Income Before Income Taxes (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2019 CNY (¥)
Income Tax Disclosure [Abstract]
PRC	¥ 677,544	$ 106,321	¥ 102,329	¥ 77,079
Non-PRC	(206,708)	(32,437)	(318,335)	(248,522)
(Loss) income before income taxes	¥ 470,836	$ 73,884	¥ (216,006)	¥ (171,443)

- Definition

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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+ Details

Taxation - Schedule of Reconciliation of Differences Between PRC Statutory Tax Rate and Effective Tax Rate for Enterprise Income Tax (Parenthetical) (Details)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Expense Benefit Continuing Operations Income Tax Reconciliation [Abstract]
Statutory income tax rate	25.00%	25.00%	25.00%

Share-Based Payments

12 Months Ended

Dec. 31, 2021

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

SHARE-BASED PAYMENTS

13. SHARE-BASED PAYMENTS

2019 Plan

In December 2019, BCPE Stack ESOP Holdco Limited (“ESOP Holdco”, a shareholder of the Company) approved a share option plan (“2019 Plan”) with a contractual term of ten years. On January 8, 2020, options for the purchase of 17,633,120 ESOP Holdco Class B shares (“Class B Options”) were granted to certain employees of the Group. These options are accounted for as equity awards and contain both service and performance vesting conditions. 60% of the options granted will vest in three or four equal installments over a three to four year service period while the remaining 40% of the options will vest in two equal installments of 20% each if prespecified performance targets related to the return on the Company’s ordinary shares are achieved. The corresponding Class B shares of the vested option can be exchanged for the Company’s ordinary shares on a one-for-one basis at any time after completion of the IPO. As of December 31, 2021, 3,873,613 ESOP Holdco Class B shares were exchanged for the Company’s Class A ordinary shares.

Pursuant to the terms and conditions of the 2019 Plan, grantees may early exercise all or a portion of the Class B Options granted prior to the completion of an IPO, however, such ESOP Holdco Class B shares issued upon exercise or the underlying ordinary shares of the Company exchangeable for after IPO still remain subject to the original service and performance vesting conditions. On April 13, 2020, all of the 17,633,120 Class B Options were early exercised into the corresponding ESOP Holdco Class B shares. The Company considered the rights and obligations of the awards under this arrangement and concluded that the early exercise of the options was not considered substantive for accounting purposes in accordance with ASC 718-10-55-31.

A portion of the Class B options with service conditions granted under 2019 Plan are subject to accelerated vesting upon listing of the Company’s equity securities on the stock exchange. On September 30, 2020 (“Listing Date”), the Company’s ADSs commenced trading on the NASDAQ, and share-based compensation expenses of RMB27,580 were immediately recognized for 3,808,818 ESOP Holdco Class B shares with vesting accelerated.

A summary of the activity is stated below:

	Number of share options/ESOP Holdco Class B shares			Weighted average grant date fair value
				US$
Awarded and unvested as of December 31, 2020		9,843,125		1.68
Granted		-		n/a
Vested		(398,553	)		1.56
Forfeited		(112,000	)		1.87
Awarded and unvested as of December 31, 2021		9,332,572			1.68
Expected to vest as of December 31, 2021		9,332,572			1.68

The weighted-average exercise price for forfeited share options during the year ended December 31, 2021 was US$0.50. The weighted-average grant-date fair value of share options granted during the years ended December 31, 2020 and 2021 was US$1.73 and nil, respectively. The total fair value of share options vested during the years ended December 31, 2020 and 2021 was US$13,923 and US$620, respectively.

2020 Plan

In May 2020, the Company’s Board of Directors approved a share option plan (“2020 Plan”) with a contractual term of ten years. The maximum aggregate number of ordinary shares that are authorized to be issued under the 2020 Plan is 5,667,164. On May 29, 2020, 5,667,164 share options were granted to an employee of the Group. These awards are accounted for as equity awards and contain both service and performance vesting conditions. 50% of the award granted will vest in four equal installments over a four-year service period while the remaining 50% of the awards will vest in two equal installments of 25% each if prespecified performance targets related to the return of the Company’s ordinary shares are achieved.

In September 2020, the Company’s Board of Directors approved to increase maximum aggregate number of ordinary shares that are authorized to be issued under the 2020 Plan to 11,334,328. 5,666,345 share options with service and/or performance vesting conditions were then granted to certain employees of the Group. These awards are accounted for as equity awards. Pursuant to the option award agreement, a portion of the share options with service conditions are subject to accelerated vesting upon listing of the Company’s equity securities on the stock exchange. Share-based compensation expenses of RMB21,914 were immediately recognized for 1,125,600 share options with vesting accelerated on the Listing Date.

13. SHARE-BASED PAYMENTS (Continued)

In October 2020, 2,805,000 share options were granted to certain employees of the Group. These awards are accounted for as equity awards and contain service conditions. Pursuant to the option award agreement, these share options granted will become vested over a service period of four years. In December 2020, the Company’s Board of Directors approved to increase maximum aggregate number of ordinary shares that are authorized to be issued under the 2020 Plan to 22,291,218.

In 2021, a total of 1,350,482 share options were granted to certain employees of the Group. These awards are accounted for as equity awards and contain service conditions. Pursuant to the option award agreement, these share options granted will become vested over a service period of three to four years.

A summary of the activity under 2020 Plan is stated below:

	Number of share options			Weighted average grant date fair value
				US$
Outstanding as of December 31, 2020*		14,136,509			4.21
Granted		1,350,482			3.17
Exercised		(2,085,515	)		4.31
Forfeited		(949,222	)		4.62
Outstanding as of December 31, 2021*		12,452,254			4.05
Vested and expected to vest as of December 31, 2021		12,452,254			4.05
Exercisable as of December 31, 2021		1,551,155			4.66

The weighted-average exercise price for granted, exercised and forfeited share options during the year ended December 31, 2021 was US$3.42, US$1.25 and US$1.92, respectively. The weighted-average exercise price for share options outstanding as of December 31, 2020 and 2021 was US$1.47 and US$1.69, respectively. The weighted-average exercise price for share options expected to vest and exercisable as of December 31, 2021 was US$1.69 and US$1.82, respectively.

The weighted-average grant-date fair value of share options granted during the years ended December 31, 2020 and 2021 was US$5.43 and US$3.17, respectively. The total intrinsic value of share options exercised during the years ended December 31, 2020 and 2021 was nil and US$4,282, respectively. The total fair value of share options vested during the years ended December 31, 2020 and 2021 was US$7,846 and US$8,258, respectively. The aggregate intrinsic value represents the difference between the fair value of the Company’s ordinary share as of December 31, 2021 and the share option’s respective exercise price. The aggregate intrinsic value of share options outstanding and currently exercisable as of December 31, 2021 was US$20,385 and US$2,356, respectively. The weighted-average remaining contractual term of share options outstanding and currently exercisable is 8.53 and 8.72 years, respectively.

As of December 31, 2021, there was US$44,440 of total unrecognized employee share-based compensation expenses related to unvested share-based awards under 2019 Plan and 2020 Plan, which are expected to be recognized over a weighted-average period of 1.45 years. Total unrecognized compensation cost may be adjusted for actual forfeitures occurring in the future.

13. SHARE-BASED PAYMENTS (Continued)

ISUs

On September 11, 2019, BCPE Bridge Cayman, L.P. (“BCPE Bridge”, a shareholder of the Company) issued 1,000,000 BCPE Bridge Class B Units to Bridge Management, L.P. (“SBC Platform”). To attract and retain key employees, the SBC Platform will grant its incentive units to eligible employees of the Group. Each SBC Platform incentive unit represents one BCPE Bridge Cayman, L.P. Class B Unit (“ISUs”). The ISUs granted are accounted for as equity awards. For ISUs granted during 2019, a portion became vested immediately upon grant, and the remaining portion will vest generally over a service period of one to five years. For ISUs granted during 2020, a portion will vest in three or four equal installments over a three to four year service period, and the remaining portion will vest in two equal installments if prespecified performance targets related to the return on the Company’s ordinary shares are achieved. Pursuant to the ISU agreements, certain ISUs with service vesting conditions are subject to accelerated vesting upon listing of the Company’s equity securities on the stock exchange. Share-based compensation of RMB5,132 was immediately recognized for 31,137 ISUs with vesting accelerated on the Listing Date.

On August 18, 2020 (“Modification Date”), in connection with the Company’s Pre-IPO private placements (Note 1), BCPE Bridge sold shares representing 21.81% of its shareholding to new investors, and the cash consideration received will be distributed to the shareholders including the SBC Platform (the “Modification”). As part of the Modification, US$30.5 million equivalent to RMB210,986 will be distributed to ISU holders in lieu of underlying ISUs according to the existing ISU vesting schedule. The Company has concluded that future service from the grantees is required for unvested ISUs. Therefore, as of the Modification Date, under ASC 718 the cash settlement was accounted for as a (i) settlement for vested ISUs with no incremental share-based compensation expenses recognized, and (ii) a modification for unvested ISUs, whereby the cash settlement amount in excess of the corresponding original fair value of cash-settled ISU was recorded on the Modification Date on a pro rata basis for the portion of the lapsed service period and remaining additional share-based compensation will be recognized over the remaining vesting schedule.

In October 2020, the SBC Platform redeemed its 1,000,000 BCPE Bridge Class B Units in exchange for 26,797,650 of the Company’s Class B ordinary shares pursuant to the terms of the original SBC Platform and related ISU agreements.

A summary of the ISU activities is stated below:

	Number of ISUs			Weighted average grant date fair value
				US$
Awarded and unvested as of December 31, 2020		385,517			74.78
Granted		18,658			79.32
Vested		(169,361	)		48.02
Forfeited		(22,385	)		124.89
Awarded and unvested as of December 31, 2021		212,429			91.23
Expected to vest as of December 31, 2021		212,429			91.23

As of December 31, 2021, there was US$13,624 of total unrecognized employee share-based compensation expenses related to unvested ISUs, which are expected to be recognized over a weighted-average period of 1.20 years. Total unrecognized compensation cost may be adjusted for actual forfeitures occurring in the future.

13. SHARE-BASED PAYMENTS (Continued)

Fair value of share options and ISUs

The fair value of share options was determined using the binomial option valuation model, with the assistance of an independent appraiser. The binomial model requires the input of a few key assumptions. For expected volatility, the Company made reference to historical volatility of several comparable companies. The exercise multiple was estimated as the average ratio of the stock price to the exercise price of when employees would decide to voluntarily exercise their vested options. As the Company did not have sufficient information of past employee exercise history, it considered the statistics on exercise patterns of employees compiled by Huddart and Lang in Huddart, S., and M. Lang. 1996. “Employee Stock Option Exercises: An Empirical Analysis.” Journal of Accounting and Economics, vol. 21, no. 1 (February):5-43, which are widely adopted by valuers as authoritative guidance on expected exercise multiples. The risk-free rate for the period within the contractual life of the options is based on the market yield of U.S. Treasury Bonds in effect at the time of grant.

The assumptions used to estimate the fair value of the share options granted during the years ended December 31, 2020 and 2021 are as follows:

	For the year ended December 31,
	2020		2021
Risk-free rate	0.57% – 1.90%		1.31% – 1.82%
Expected volatility range	39.65% – 40.53%		41% – 43%
Exercise multiple		2.80		2.80
Fair value per ordinary share as at valuation dates	US$2.32 – US$14.00		US$4.02 –US$8.27

The fair value of the ISUs is the fair value of BCPE Bridge Cayman, L.P. Class B units at the grant date, which was determined by allocating the BCPE Bridge Cayman, L.P. equity value between the Class A and Class B units based on the predetermined distribution rate.

A summary of share-based compensation expenses recognized in the consolidated statements of comprehensive (loss) income for the years ended December 31, 2019, 2020 and 2021 are as follows:

	2019		2020		2021		2021
	RMB		RMB		RMB		US$
Cost of revenue		—		32,990		6,170		968
Selling and marketing		—		21,691		13,562		2,128
General and administrative		63,746		295,165		100,992		15,848
Total share-based compensation expenses		63,746		349,846		120,724		18,944

In addition, the Company capitalized RMB20,127 in cost of the share options granted to the construction employees as construction in progress for the year ended December 31, 2020. Capitalized share-based compensation costs were immaterial for the years ended December 31, 2019 and 2021.

Restricted Net Assets - Additional Information (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)
Disclosure Of Restricted Net Assets [Line Items]
Appropriation of after tax profit to statutory surplus fund limit registered capital percentage	50.00%
Description of allocation of tax profit to general reserve	In accordance with the Regulations on Enterprises with Foreign Investment of China and their Articles of Association, the Company’s wholly foreign-owned enterprises, being foreign invested enterprise established in the PRC, are required to allocate at least 10% of their after-tax profit determined based on the PRC accounting standards and regulations to the general reserve until the reserve has reached 50% of the relevant subsidiary’s registered capital.
Statutory reserves	¥ 189,700	$ 29,768	¥ 82,792
Restricted net assets	¥ 3,837,898	$ 602,250
VIEs
Disclosure Of Restricted Net Assets [Line Items]
Appropriation of after tax profit to statutory surplus fund limit registered capital percentage	50.00%
Description of allocation of tax profit to general reserve	In accordance with the PRC Company Laws, the VIEs must make appropriations from their annual after-tax profits as reported in their PRC statutory accounts to non-distributable reserve funds, namely statutory reserve and discretionary surplus reserve. The VIEs are required to allocate at least 10% of their after-tax profits to the statutory reserve until such fund has reached 50% of their respective registered capital.
Minimum
Disclosure Of Restricted Net Assets [Line Items]
Percentage of allocation of after tax profit	10.00%
Minimum \| VIEs
Disclosure Of Restricted Net Assets [Line Items]
Percentage of allocation of after tax profit	10.00%

Share-Based Payments - Summary of Assumptions Used to Estimate Fair Value of Share Options Granted (Details) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Risk-free rate, minimum	1.31%	0.57%
Risk-free rate, maximum	1.82%	1.90%
Expected volatility range, minimum	41.00%	39.65%
Expected volatility range, maximum	43.00%	40.53%
Exercise multiple	2.80	2.80
Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Fair value per ordinary share as at valuation dates	$ 4.02	$ 2.32
Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Fair value per ordinary share as at valuation dates	$ 8.27	$ 14.00

Related Party Transactions - Additional Information (Details) - CNY (¥)	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Related Party Transactions [Abstract]
Provision for credit losses recognized for due from related parties amount	¥ 0	¥ 0	¥ 0

Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2021

Goodwill And Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets

	As of December 31,
	2020			2021			2021
	RMB			RMB			US$
Acquired customer relationships		397,979			396,499			62,219
Acquired license and others		2,556			30,834			4,839
Less: accumulated amortization		(80,236	)		(121,533	)		(19,071	)
Intangible assets, net		320,299			305,800			47,987

Accrued Expenses and Other Current Liabilities - Summary of Accrued Expenses and Other Current Liabilities (Parenthetical) (Details) - 12 months ended Dec. 31, 2021 ¥ in Thousands, $ in Thousands	CNY (¥)	USD ($)
Accounts Payable And Accrued Liabilities Current [Abstract]
Incremental interest payable	¥ 223,084	$ 35,007

Condensed Financial Information of the Parent Company - Basis of Presentation - Additional Information (Details)	12 Months Ended
	Dec. 31, 2021 CNY (¥)
Parent Company
Condensed Financial Statements Captions [Line Items]
Dividend paid	¥ 0

Lease

12 Months Ended

Dec. 31, 2021

Leases [Abstract]

LEASE

5. LEASE

Lessee Accounting

The Group’s leases consist of the leasing of building and office space, land, fiber optics and certain equipment. The Group’s land use rights represent land leased for constructing and operating IDC colocation service or rental businesses in the PRC, Malaysia and India. The land use rights represent lease prepayments that are amortized over the term of the land use rights, some of which include options to extend the leases that have not been included in the calculation of the Group’s ROU assets and lease liabilities. Variable lease payments were immaterial for the periods presented.

The components of lease expense were as follows:

	For the year ended December 31,
	2019		2020		2021		2021
	RMB		RMB		RMB		US$
Operating lease cost		24,224		40,479		47,055		7,384
Finance lease cost		8,931		4,724		6,983		1,096
Short-term lease cost		1,661		2,208		1,021		160
		34,816		47,411		55,059		8,640

5. LEASE (Continued)

Lessee Accounting (Continued)

Maturities of lease liabilities are as follows:

	Operating Leases						Finance Leases
	RMB			US$			RMB			US$
Year ending December 31, 2022		47,220			7,410			5,251			824
Year ending December 31, 2023		40,303			6,324			5,350			840
Year ending December 31, 2024		29,955			4,701			5,475			859
Year ending December 31, 2025		28,426			4,461			5,569			874
Year ending December 31, 2026 and thereafter		246,815			38,731			163,222			25,613
Total lease payments		392,719			61,627			184,867			29,010
Less imputed interest		(148,412	)		(23,290	)		(123,100	)		(19,317	)
Present value of lease liabilities		244,307			38,337			61,767			9,693

Other supplemental information related to leases is summarized below:

	For the year ended December 31,
	2019		2020		2021		2021
	RMB		RMB		RMB		US$
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows used in operating leases		21,092		40,275		41,832		6,564
Operating cash flows used in finance leases		6,599		6,008		5,751		902
Financing cash flows used in finance leases		9,230		18,441		7,723		1,212
Lease liabilities arising from obtaining right-of-use assets
Operating leases		13,044		8,091		23,002		3,610
Finance leases		178		708		—		—

	As of December 31,
	2020			2021
Weighted-average remaining lease term (years)
Operating leases		13.68			12.43
Finance leases		27.07			26.09
Weighted-average discount rate
Operating leases		8.59	%		8.60	%
Finance leases		9.05	%		9.05	%

Lessor Accounting

The Group’s lease contracts in Malaysia do not have the option to extend or terminate the lease or provide the customer the right to purchase the asset at the end of the contract term. Instead, renewal of such contracts requires negotiation of mutually agreed upon terms by both parties. As of December 31, 2021, minimum lease payments expected to be collected were as follows:

	As of December 31, 2021
	RMB		US$
Year ending December 31, 2022		116,332		18,255
Year ending December 31, 2023		222,606		34,932
Year ending December 31, 2024		216,924		34,040
Year ending December 31, 2025		227,801		35,747
Year ending December 31, 2026 and thereafter		841,633		132,071
Total		1,625,296		255,045

Goodwill - Summary of Goodwill (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)
Goodwill [Line Items]
Beginning balance	¥ 472,883
Ending balance	472,883	$ 74,206	¥ 472,883
Stack Group
Goodwill [Line Items]
Beginning balance	472,883		466,320
Goodwill acquired (Note 17)			6,563
Ending balance	¥ 472,883	$ 74,206	¥ 472,883

Lease - Summary of Other Supplemental Information Related to Leases (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2019 CNY (¥)
Leases [Abstract]
Operating cash flows used in operating leases	¥ 41,832	$ 6,564	¥ 40,275	¥ 21,092
Operating cash flows used in finance leases	5,751	902	6,008	6,599
Financing cash flows used in finance leases	7,723	1,212	18,441	9,230
Lease liabilities arising from obtaining right-of-use assets
Operating leases	23,002	3,610	8,091	13,044
Finance leases	¥ 0	$ 0	¥ 708	¥ 178
Weighted-average remaining lease term (years)
Operating leases	12 years 5 months 4 days	12 years 5 months 4 days	13 years 8 months 4 days
Finance leases	26 years 1 month 2 days	26 years 1 month 2 days	27 years 25 days
Weighted-average discount rate
Operating leases	8.60%	8.60%	8.59%
Finance leases	9.05%	9.05%	9.05%

Summary of Significant Accounting Policies - Schedule of Reconciliation of all financial Instruments Measured at Fair Value on a Recurring Basis Using Level 3 Unobservable Inputs (Details) - Fair Value, Recurring - Significant Unobservable Inputs (Level 3) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning balance	¥ 13,609		¥ 14,630
Settlement	(19,493)		(8,783)
Fair value change	5,884		7,762
Year end balance	0		¥ 13,609
The amount of total gain for the year ended December 31, 2021	¥ 5,884	$ 923

Accrued Expenses and Other Current Liabilities (Tables)

12 Months Ended

Dec. 31, 2021

Accounts Payable And Accrued Liabilities Current [Abstract]

Summary of Accrued Expenses and Other Current Liabilities

	As of December 31,
	2020		2021		2021
	RMB		RMB		US$
Payroll payable		48,339		59,432		9,326
Interest payable*		14,639		239,853		37,638
Deferred government grants		8,629		8,629		1,354
Other tax and surcharges payable		28,904		90,011		14,125
Accrued expenses		52,768		42,693		6,699
Others		58,270		70,639		11,085
		211,549		511,257		80,227

Accumulated Other Comprehensive Income (Loss)

12 Months Ended

Dec. 31, 2021

Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)

16. ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)

	RMB
Balance as of January 1, 2019		18,044
Foreign currency translation adjustments, net of tax of nil		21,967
Balance as of December 31, 2019		40,011
Foreign currency translation adjustments, net of tax of nil		(212,597	)
Balance as of December 31, 2020		(172,586	)
Foreign currency translation adjustments, net of tax of nil		(85,391	)
Balance as of December 31, 2021		(257,977	)
Balance as of December 31, 2021, in US$		(40,482	)

There have been no reclassifications out of accumulated other comprehensive income (loss) to net loss (income) for the years presented.

Taxation

12 Months Ended

Dec. 31, 2021

Income Tax Disclosure [Abstract]

TAXATION

12. TAXATION

Enterprise income tax

Under the current laws of the Cayman Islands, the Company and certain subsidiaries incorporated in the Cayman Islands are not subject to tax on income or capital gains.

The Group’s PRC entities are subject to the statutory income tax rate of 25%, in accordance with the Enterprise Income Tax law (the “EIT Law”), which was effective since January 1, 2008. Chindata (Hebei) Co., Ltd. being qualified as a High New Technology Enterprise (“HNTE”) was entitled to the preferential income tax rate of 15% for three years from 2018 to 2020. In 2021, Chindata (Hebei) Co., Ltd. submitted the HNTE renewal applications and is anticipated to obtain the renewed HNTE certificate and enjoy the preferential income tax rate of 15% for three years from 2021 to 2023. Datong Qinhuai Data Co., Ltd. has passed HNTE qualification assessment and is anticipated to be recognized as a HNTE in year 2021, which can be entitled to the preferential income tax rate of 15% for three years from 2021 to 2023.

Dividends, interests, rent or royalties payable by the Group’s PRC entities, to non-PRC resident enterprises, and proceeds from any such non-resident enterprise investor’s disposition of assets (after deducting the net value of such assets) shall be subject to 10% EIT, namely withholding tax, unless the respective non-PRC resident enterprise’s jurisdiction of incorporation has a tax treaty or arrangements with China that provides for a reduced withholding tax rate or an exemption from withholding tax.

The Group’s Malaysian subsidiaries subject to income tax at the statutory rate of 24% in accordance with Malaysia corporate income tax laws and regulations.

(Loss) income before income taxes consists of:

	For the year ended December 31,
	2019			2020			2021			2021
	RMB			RMB			RMB			US$
PRC		77,079			102,329			677,544			106,321
Non-PRC		(248,522	)		(318,335	)		(206,708	)		(32,437	)
		(171,443	)		(216,006	)		470,836			73,884

The current and deferred components of income tax (benefit) expense appearing in the consolidated statements of comprehensive (loss) income are as follows:

	For the year ended December 31,
	2019			2020		2021		2021
	RMB			RMB		RMB		US$
Current income tax expense		631			59,964		147,818		23,196
Deferred income tax (benefit) expense		(2,373	)		7,375		6,598		1,035
		(1,742	)		67,339		154,416		24,231

12. TAXATION (Continued)

A reconciliation of the differences between the PRC statutory tax rate and the Company’s effective tax rate for enterprise income tax is as follows:

	For the year ended December 31,
	2019			2020			2021			2021
	RMB			RMB			RMB			US$
(Loss) income before income tax		(171,443	)		(216,006	)		470,836			73,884
Income tax computed at the PRC statutory tax rate of 25%		(42,861	)		(54,001	)		117,709			18,471
Effect of differing tax rates in different jurisdictions		23,599			35,228			24,378			3,826
Effect of PRC preferential tax rates		(3,346	)		(22,350	)		(30,191	)		(4,738	)
Research and development expense super-deduction		(4,001	)		(7,557	)		(12,232	)		(1,919	)
Effect of tax rate changes on deferred taxes		—			5,325			(6,446	)		(1,012	)
Non-deductible expenses and non-taxable income, net*		384			106,892			57,631			9,043
Change in valuation allowance		24,483			3,802			3,567			560
Income tax (benefit) expense		(1,742	)		67,339			154,416			24,231

*	Primarily represents share-based compensation expense, other non-deductible expenses, and income from entities not subject to income tax.

Deferred tax

The significant components of the Group’s deferred tax assets and liabilities are as follows:

	As of December 31,
	2020		2021		2021
	RMB		RMB		US$
Deferred tax assets
Tax loss carry forward		67,873		89,147		13,989
Unabsorbed capital allowance		63,297		73,567		11,544
Depreciation and amortization expense		23,887		82,957		13,018
Operating lease		60,878		59,748		9,376
Accrued expenses and others		35,245		29,212		4,584
Less: Valuation allowance*		71,229		72,606		11,393
		179,951		262,025		41,118

	As of December 31,
	2020		2021		2021
	RMB		RMB		US$
Deferred tax liabilities
Property and equipment		222,489		329,917		51,771
Acquisition of intangible assets		105,805		86,283		13,540
Debt issuance cost		13,243		15,431		2,421
Operating lease		64,358		63,039		9,892
Others		9,698		7,439		1,168
		415,593		502,109		78,792
Presentation in the consolidated balance sheets:
Deferred tax assets		18,789		30,866		4,844
Deferred tax liabilities		254,431		270,950		42,518
Net deferred tax liabilities		235,642		240,084		37,674

12. TAXATION (Continued)

Based upon the level of historical taxable income, scheduled reversal of deferred tax liabilities and projections for future taxable income over the periods in which the deferred tax assets are realizable, management recorded full valuation allowance against deferred tax assets of those subsidiaries and VIEs that are in a cumulative loss as of December 31, 2020 and 2021, except for the portion that can be realized by matching reversals of deferred tax liabilities, and/or using future taxable income.

As of December 31, 2021, the aggregate undistributed earnings from the Company’s WFOEs as well as VIEs that are available for distribution are RMB1,023,628 (US$160,630). The Company has considered its operational funding needs, future development initiatives and its dividend distribution plan, and will permanently reinvesting all of its aggregate undistributed earnings. Determination of the amount of unrecognized deferred tax liability related to the earnings that are indefinitely reinvested is not practical.

As of December 31, 2021, the Group had net losses of approximately RMB362,461 (US$56,878) mainly deriving from entities in the PRC and Malaysia. The tax losses in PRC can be carried forward for five years to offset future taxable profit, and the period can be extended to ten years for entities that qualify as HNTE. The tax losses of entities in the PRC will begin to expire in 2023, if not utilized. The tax losses in Malaysia can be carried forward for seven years to offset future taxable profit. The tax losses of entities in Malaysia will begin to expire in 2024, if not utilized.

Unrecognized Tax Benefit

The Group evaluated its income tax uncertainty under ASC 740-10. ASC 740-10 clarifies the accounting for uncertainty in income taxes by prescribing the recognition threshold a tax position is required to meet before being recognized in the financial statements. The Group elects to classify interest and penalties related to an uncertain tax position, if and when required, as part of income tax expense in the consolidated statements of comprehensive (loss) income. As of and for the years ended December 31, 2019 and 2020, there were no significant impact from tax uncertainties on the Group’s financial position and result of operations.

As of December 31, 2021, the Group had unrecognized tax benefits of RMB63,643 (US$9,987), of which RMB63,643 (US$9,987) is presented on a net basis against the deferred tax assets related to tax loss carry forwards on the consolidated balance sheet. It is possible that the amount of unrecognized benefits will further change in the next 12 months; however, an estimate of the range of the possible change cannot be made at this moment. As of December 31, 2021, unrecognized tax benefits of RMB63,643 (US$9,987), if ultimately recognized, will impact the effective tax rate. A reconciliation of the beginning and ending amount of unrecognized tax benefits was as follows:

	Unrecognized tax benefits
	RMB
Balance as of December 31, 2020		4,478
Increase		59,316
Decrease		(151	)
Balance as of December 31, 2021		63,643
Balance as of December 31, 2021 (US$)		9,987

For the year ended December 31, 2021, the Group recorded interest expense accrued in relation to the unrecognized tax benefits of RMB2,729 (US$428) in income tax expense. Accumulated interest expense recorded in unrecognized tax benefits was RMB3,288 (US$516) as of December 31, 2021.

In general, the tax authorities have five to seven years to conduct examinations of the tax filings of the Group’s subsidiaries. Accordingly, the subsidiaries’ tax years of 2016 through 2021 remain open to examination by the respective tax authorities.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 21
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32857-109319

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 11.C)
-URI http://asc.fasb.org/extlink&oid=122134291&loc=d3e330215-122817

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 17
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32809-109319

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 6.I.5.Q1)
-URI http://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 14
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32705-109319

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 270
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6424409&loc=d3e44925-109338

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-URI http://asc.fasb.org/topic&trid=2144680

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6424122&loc=d3e41874-109331

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(h)(2))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

+ Details

Property and Equipment

12 Months Ended

Dec. 31, 2021

Property Plant And Equipment [Abstract]

PROPERTY AND EQUIPMENT

7. PROPERTY AND EQUIPMENT

	As of December 31,
	2020			2021			2021
	RMB			RMB			US$
Buildings		1,909,633			2,721,086			426,998
Data center equipment		3,945,877			4,607,321			722,989
Furniture and office equipment		11,934			17,086			2,681
Computers and network equipment		16,677			14,858			2,332
Motor vehicles		6,868			10,001			1,569
Purchased software		6,984			12,763			2,003
Leasehold improvements		36,358			48,674			7,638
Construction in progress		1,196,551			3,218,617			505,071
		7,130,882			10,650,406			1,671,281
Less: accumulated depreciation		(707,052	)		(1,222,815	)		(191,886	)
Property and equipment, net		6,423,830			9,427,591			1,479,395

Depreciation expense for the years ended December 31, 2019, 2020 and 2021 was RMB208,415, RMB369,686 and RMB543,597 (US$85,302), respectively.

Accounts Receivable

12 Months Ended

Dec. 31, 2021

Accounts Receivable Net [Abstract]

ACCOUNTS RECEIVABLE

6. ACCOUNTS RECEIVABLE

	As of December 31,
	2020			2021			2021
	RMB			RMB			US$
Accounts receivable		434,720			661,951			103,875
Allowance for credit losses		(12,496	)		(924	)		(145	)
Accounts receivable, net		422,224			661,027			103,730

The movements in the allowance for credit losses were as follows:

	2020		2021			2021
	RMB		RMB			US$
Balance at the beginning of the year		4,770		12,496			1,961
Cumulative effect of adoption of ASU 2016-13		—		(11,054	)		(1,735	)
Provisions/(Reversal)		7,726		(286	)		(45	)
Write-offs		—		(232	)		(36	)
Balance at the end of the year		12,496		924			145

Share-Based Payments - Summary of Activity - 2020 Plan (Details) - 2020 Plan - $ / shares			12 Months Ended
	Aug. 26, 2020	May 29, 2020	Dec. 31, 2021	Dec. 31, 2020
Number of share options
Outstanding, beginning balance			14,136,509
Granted		5,667,164	1,350,482
Exercised	(5,667,164)		(2,085,515)
Forfeited			(949,222)
Outstanding, ending balance			12,452,254	14,136,509
Vested and expected to vest as of December 31, 2021			12,452,254
Exercisable, ending balance			1,551,155
Weighted average grant date fair value
Outstanding, beginning balance			$ 4.21
Granted			3.17	$ 5.43
Exercised			4.31
Forfeited			4.62
Outstanding, ending balance			4.05	$ 4.21
Vested and expected to vest as of December 31, 2021			4.05
Exercisable, ending balance			$ 4.66

Share-based Payments - Summary of Share-based Compensation Expenses Recognized in the Consolidated Statements of Comprehensive (Loss) Income (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2019 CNY (¥)
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total share-based compensation expenses	¥ 120,724	$ 18,944	¥ 349,846	¥ 63,746
Cost of Revenue
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total share-based compensation expenses	6,170	968	32,990	0
Selling and Marketing
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total share-based compensation expenses	13,562	2,128	21,691	0
General and Administrative
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total share-based compensation expenses	¥ 100,992	$ 15,848	¥ 295,165	¥ 63,746

Consolidated Statements of Cash Flows ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2019 CNY (¥)
CASH FLOWS FROM OPERATING ACTIVITIES
Net (loss) income	¥ 316,420	$ 49,653	¥ (283,345)	¥ (169,701)
Adjustments to reconcile net (loss) income to net cash generated from operating activities:
Depreciation and amortization	587,080	92,126	410,694	241,175
Share-based compensation	120,724	18,944	349,846	63,746
Allowance for credit losses	4,646	729	3,850	5,265
Deferred income taxes	6,598	1,035	7,375	(2,373)
Changes in fair value of financial instruments	(12,605)	(1,978)	12,717	11,189
Amortization of debt issuance cost	35,808	5,619	33,455	10,887
Others	6,188	971	(120)	8,301
Changes in operating assets and liabilities:
Accounts receivable	(209,593)	(32,890)	(121,890)	(160,595)
Amount due from related parties	42	7	88,887	(420)
Value added taxes recoverable	123,988	19,456	6,900	(11,482)
Prepayments and other current assets	(194,617)	(30,540)	(38,934)	(11,225)
Operating lease right-of-use assets	(1,467)	(230)	10,800	(7,065)
Other non-current assets	(13,974)	(2,193)	(3,510)	12,797
Accounts payable	14,211	2,230	21,236	46,274
Income taxes payable	1,896	298	28,622	(1,007)
Amount due to related parties	6,754	1,060	(61,740)	(32,578)
Accrued expenses and other current liabilities	105,143	16,499	69,142	29,988
Operating lease liabilities	(129)	(20)	(10,854)	5,510
Other non-current liabilities	168,392	26,426	141,779	1,481
Net cash generated from operating activities	1,065,505	167,202	664,910	40,167
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of property and equipment and other long-lived assets, net of proceeds from sales of property and equipment	(3,452,962)	(541,845)	(2,424,647)	(1,611,253)
Purchase of land use rights	(163,896)	(25,719)	(287,630)	(30,346)
Cash paid for investment and business combination, net of cash acquired	(150,000)	(23,538)	(56,992)	(1,879,040)
Purchase of short-term investments	(285,506)	(44,802)
Sales and maturities of short-term investments	99,393	15,597
Net cash used in investing activities	(3,952,971)	(620,307)	(2,769,269)	(3,520,639)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuance of ordinary shares			1,810,200	2,274,133
Proceeds from IPO and concurrent private placements, net of issuance cost			4,871,804
Payment of issuance cost for ordinary shares issued in prior year	(14,734)	(2,312)
Proceeds from exercise of share options	10,449	1,640
Principal portion of finance lease payments	(7,723)	(1,212)	(18,441)	(11,105)
Proceeds from short-term bank loans	266,155	41,766	68,971	15,000
Proceeds from long-term bank loans	1,749,836	274,587	1,743,315	2,408,457
Payment of debt issuance cost	(32,973)	(5,175)	(47,128)	(68,897)
Contribution from non-controlling interests of a subsidiary				300,000
Repayment of short-term bank loans	(64,606)	(10,138)	(15,000)
Repayment of long-term bank loans	(613,343)	(96,247)	(224,919)	(461,260)
Net cash generated from financing activities	1,293,061	202,909	8,188,802	4,456,328
Exchange rate effect on cash, cash equivalents and restricted cash	(76,056)	(11,936)	(292,820)	(719)
Net increase (decrease) in cash, cash equivalents and restricted cash	(1,670,461)	(262,132)	5,791,623	975,137
Cash and cash equivalents and restricted cash at the beginning of the year	6,911,463	1,084,559	1,119,840	144,703
Cash, cash equivalents and restricted cash at the end of the year	5,241,002	822,427	6,911,463	1,119,840
Supplemental disclosures of cash flow information:
Interest expense paid	259,719	40,756	197,581	83,872
Income taxes paid	84,028	13,186	27,774	1,020
Supplemental disclosures of non-cash information:
Purchase of property and equipment included in accounts payable	1,598,020	250,764	1,121,253	524,843
Purchase of non-controlling interests through issuance of ordinary shares				304,742
Reconciliation of cash, cash equivalents and restricted cash
Cash and cash equivalents	4,390,293	688,933	6,705,612	1,038,897
Restricted cash	850,709	133,494	205,851	80,943
Cash, cash equivalents and restricted cash at the end of the year	¥ 5,241,002	$ 822,427	¥ 6,911,463	¥ 1,119,840

Loss (Earnings) Per Share

12 Months Ended

Dec. 31, 2021

Earnings Per Share [Abstract]

Loss (Earnings) Per Share

15. LOSS (EARNINGS) PER SHARE

Basic and diluted (loss) earnings per share for each of the years presented are calculated as follows:

	For the year ended December 31,
	2019			2020						2021
	Ordinary shares			Class A			Class B			Class A				Class B
	RMB			RMB			RMB			RMB		US$		RMB			US$
(Loss) Earnings per share-basic:
Numerator:
Allocation of net (loss) income available to ordinary shareholders		(174,443	)		(105,403	)		(177,942	)		153,692		24,118		162,728			25,535
Denominator:
Weighted average number of ordinary shares outstanding		397,153,121			228,284,218			385,389,358			352,642,396		352,642,396		373,375,848			373,375,848
Denominator used for (loss) earnings per share		397,153,121			228,284,218			385,389,358			352,642,396		352,642,396		373,375,848			373,375,848
(Loss) Earnings per share-basic		(0.44	)		(0.46	)		(0.46	)		0.44		0.07		0.44			0.07

(Loss) Earnings per share-diluted:
Numerator:
Allocation of net (loss) income available to ordinary shareholders		(174,443	)		(105,403	)		(177,942	)		153,692		24,118		162,728			25,535
Reallocation of net (loss) income available to ordinary shares as a result of conversion of Class B to Class A ordinary shares		—			(177,942	)		—			162,728		25,535		—			—
Reallocation of net (loss) income to Class B ordinary shares		—			—			—			—		—		(108	)		(17	)
Net (loss) income available to ordinary shareholders		(174,443	)		(283,345	)		(177,942	)		316,420		49,653		162,620			25,518
Denominator:
Weighted average number of ordinary shares outstanding		397,153,121			228,284,218			385,389,358			352,642,396		352,642,396		373,375,848			373,375,848
Share-based awards		—			—			—			1,705,149		1,705,149		1,291,857			1,291,857
Conversion of Class B including potential ordinary shares to Class A ordinary share		—			385,389,358			—			374,667,705		374,667,705		—			—
Denominator used for (loss) earnings per share		397,153,121			613,673,576			385,389,358			729,015,250		729,015,250		374,667,705			374,667,705
(Loss) Earnings per share-diluted		(0.44	)		(0.46	)		(0.46	)		0.43		0.07		0.43			0.07

Summary of Significant Accounting Policies - Additional Information1 (Details)	Dec. 31, 2021
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2022-01-01
Summary Of Significant Accounting Policies [Line Items]
Revenue, performance obligation percentage	11.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2023-01-01
Summary Of Significant Accounting Policies [Line Items]
Revenue, performance obligation percentage	48.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	4 years
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2027-01-01
Summary Of Significant Accounting Policies [Line Items]
Revenue, performance obligation percentage	41.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period

Lease - Schedule of Maturities of Lease Liabilities (Details) ¥ in Thousands, $ in Thousands	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)
Operating Leases
Year ending December 31, 2022	¥ 47,220	$ 7,410
Year ending December 31, 2023	40,303	6,324
Year ending December 31, 2024	29,955	4,701
Year ending December 31, 2025	28,426	4,461
Year ending December 31, 2026 and thereafter	246,815	38,731
Total lease payments	392,719	61,627
Less imputed interest	(148,412)	(23,290)
Present value of lease liabilities	¥ 244,307	$ 38,337
Operating Lease, Liability, Statement of Financial Position [Extensible List]	Present value of lease liabilities	Present value of lease liabilities
Finance Leases
Year ending December 31, 2022	¥ 5,251	$ 824
Year ending December 31, 2023	5,350	840
Year ending December 31, 2024	5,475	859
Year ending December 31, 2025	5,569	874
Year ending December 31, 2026 and thereafter	163,222	25,613
Total lease payments	184,867	29,010
Less imputed interest	(123,100)	(19,317)
Present value of lease liabilities	¥ 61,767	$ 9,693
Finance Lease, Liability, Statement of Financial Position [Extensible List]	Present value of lease liabilities	Present value of lease liabilities

Short-Term Investment - Additional Information (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2019 CNY (¥)
Short Term Investments [Line Items]
Changes in fair value of financial instruments	¥ 12,605	$ 1,978	¥ (12,717)	¥ (11,189)
Held-to-maturity Debt Securities
Short Term Investments [Line Items]
Interest income from held to maturity debt securities	350	55	0	0
Trading Securities
Short Term Investments [Line Items]
Changes in fair value of financial instruments	¥ 8,341	$ 1,309	¥ 0	¥ 0

Bank Loans

12 Months Ended

Dec. 31, 2021

Secured Longterm Debt Current And Noncurrent [Abstract]

BANK LOANS

11. BANK LOANS

The Group’s borrowings consisted of the following:

	As of December 31,
	2020		2021		2021
	RMB		RMB		US$
Secured short-term bank loans		66,135		260,980		40,953
Secured long-term bank loans		4,122,898		5,216,005		818,505
		4,189,033		5,476,985		859,458

The Group entered into loan agreements with various financial institutions for data center project development and working capital purpose with terms ranging from 1 to 7 years.

As of December 31, 2021, the Group had total financing credit facilities of RMB4,503,352, US$345,000 and MYR248,000 from various financial institutions, of which the unused amount was RMB400,000, US$30,000 and MYR nil, respectively.

As of December 31, 2021, certain bank borrowings denominated in RMB are secured by certain subsidiaries’ restricted cash, accounts receivable, property and equipment and land use rights with net book value of RMB54,692, RMB543,220, RMB2,666,108, and RMB115,017 respectively. Two loan facilities amounted to US$120,000 is guaranteed by standby letters of credit of US$150,000. Others are guaranteed by designated subsidiaries of the Group or secured by property, assets, deposits and shares of designated subsidiaries.

The weighted average interest rate on short-term bank loans as of December 31, 2020 and 2021 was 7.00% and 6.82%, respectively. The weighted average interest rate on long-term bank loans as of December 31, 2020 and 2021 was 7.87% and 7.13%, respectively. Management assessed that there was no breach of loan covenants for all its bank borrowings as of December 31, 2020 and 2021, respectively.

As of December 31, 2021, the loan principal will be due according to the following schedule:

	RMB		US$
2022		1,973,392		309,668
2023		551,390		86,525
2024		1,160,896		182,170
2025		1,126,985		176,849
2026 and thereafter		747,736		117,336
		5,560,399		872,548

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-URI http://asc.fasb.org/topic&trid=2208564

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
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-Section 50
-Paragraph 1B
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-URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611

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-Subparagraph (SX 210.4-08(c))
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-Paragraph 1C
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495334-112611

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1C
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495334-112611

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1E
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495348-112611

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1I
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495371-112611

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
-Subparagraph (i)
-URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611

+ Details

Bank Loans - Additional Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 CNY (¥)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2021 MYR (RM)
Debt Instrument [Line Items]
Financing credit facilities, amount	¥ 4,503,352,000		$ 345,000	RM 248,000,000
Unused loan facilities for bank borrowings	¥ 400,000,000		$ 30,000	RM 0
Weighted average interest rate on short-term bank loans	6.82%	7.00%	6.82%	6.82%
Weighted average interest rate on long-term bank loans	7.13%	7.87%	7.13%	7.13%
Breach of loan	¥ 0	¥ 0
Secured Debt \| Bank Borrowings \| Restricted Cash
Debt Instrument [Line Items]
Loan facility amount	54,692,000
Secured Debt \| Bank Borrowings \| Accounts Receivable
Debt Instrument [Line Items]
Loan facility amount	543,220,000
Secured Debt \| Bank Borrowings \| Property and Equipment
Debt Instrument [Line Items]
Loan facility amount	2,666,108,000
Secured Debt \| Bank Borrowings \| Land Use Rights
Debt Instrument [Line Items]
Loan facility amount	¥ 115,017,000
Secured Debt \| Standby Letter of Credit \| Bank Borrowings
Debt Instrument [Line Items]
Loan facility amount \| $			$ 150,000
Secured Debt \| Standby Letter of Credit \| Bank Borrowings \| Two Loan Facilities
Debt Instrument [Line Items]
Financing credit facilities, amount \| $			$ 120,000
Minimum
Debt Instrument [Line Items]
Loan agreements, term	1 year
Maximum
Debt Instrument [Line Items]
Loan agreements, term	7 years

Summary of Significant Accounting Policies - Schedule Schedule of Property Plant and Equipment Estimated Useful Lives of Assets (Details)	12 Months Ended
	Dec. 31, 2021
Buildings \| Minimum
Property Plant And Equipment [Line Items]
Estimated useful lives of the assets	20 years
Buildings \| Maximum
Property Plant And Equipment [Line Items]
Estimated useful lives of the assets	40 years
Data Center Equipment - Machinery \| Minimum
Property Plant And Equipment [Line Items]
Estimated useful lives of the assets	10 years
Data Center Equipment - Machinery \| Maximum
Property Plant And Equipment [Line Items]
Estimated useful lives of the assets	20 years
Furniture and Office Equipment \| Minimum
Property Plant And Equipment [Line Items]
Estimated useful lives of the assets	3 years
Furniture and Office Equipment \| Maximum
Property Plant And Equipment [Line Items]
Estimated useful lives of the assets	5 years
Data Center Equipment - Other Equipment \| Minimum
Property Plant And Equipment [Line Items]
Estimated useful lives of the assets	3 years
Data Center Equipment - Other Equipment \| Maximum
Property Plant And Equipment [Line Items]
Estimated useful lives of the assets	5 years
Computers and Network Equipment \| Minimum
Property Plant And Equipment [Line Items]
Estimated useful lives of the assets	3 years
Computers and Network Equipment \| Maximum
Property Plant And Equipment [Line Items]
Estimated useful lives of the assets	5 years
Motor Vehicles \| Minimum
Property Plant And Equipment [Line Items]
Estimated useful lives of the assets	3 years
Motor Vehicles \| Maximum
Property Plant And Equipment [Line Items]
Estimated useful lives of the assets	10 years
Purchased Software \| Minimum
Property Plant And Equipment [Line Items]
Estimated useful lives of the assets	5 years
Purchased Software \| Maximum
Property Plant And Equipment [Line Items]
Estimated useful lives of the assets	10 years
Leasehold Improvements
Property Plant And Equipment [Line Items]
Estimated useful lives of the assets	Lesser of useful life or lease term

Lease - Summary of Components of Lease Expense (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2019 CNY (¥)
Lease Cost [Abstract]
Operating lease cost	¥ 47,055	$ 7,384	¥ 40,479	¥ 24,224
Finance lease cost	6,983	1,096	4,724	8,931
Short-term lease cost	1,021	160	2,208	1,661
Lease expense	¥ 55,059	$ 8,640	¥ 47,411	¥ 34,816

Intangible Assets - Additional Information (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2019 CNY (¥)
Goodwill And Intangible Assets Disclosure [Abstract]
Amortization expense	¥ 42,221	$ 6,625	¥ 42,292	¥ 32,760
Estimated amortization expense, 2022	42,405
Estimated amortization expense, 2023	45,414
Estimated amortization expense, 2024	47,720
Estimated amortization expense, 2025	47,227
Estimated amortization expense, 2026	¥ 39,697

Lease (Tables)

12 Months Ended

Dec. 31, 2021

Leases [Abstract]

Summary of Components of Lease Expense

The components of lease expense were as follows:

	For the year ended December 31,
	2019		2020		2021		2021
	RMB		RMB		RMB		US$
Operating lease cost		24,224		40,479		47,055		7,384
Finance lease cost		8,931		4,724		6,983		1,096
Short-term lease cost		1,661		2,208		1,021		160
		34,816		47,411		55,059		8,640

5. LEASE (Continued)

Schedule of Maturities of Lease Liabilities

Lessee Accounting (Continued)

Maturities of lease liabilities are as follows:

	Operating Leases						Finance Leases
	RMB			US$			RMB			US$
Year ending December 31, 2022		47,220			7,410			5,251			824
Year ending December 31, 2023		40,303			6,324			5,350			840
Year ending December 31, 2024		29,955			4,701			5,475			859
Year ending December 31, 2025		28,426			4,461			5,569			874
Year ending December 31, 2026 and thereafter		246,815			38,731			163,222			25,613
Total lease payments		392,719			61,627			184,867			29,010
Less imputed interest		(148,412	)		(23,290	)		(123,100	)		(19,317	)
Present value of lease liabilities		244,307			38,337			61,767			9,693

Summary of Other Supplemental Information Related to Leases

Other supplemental information related to leases is summarized below:

	For the year ended December 31,
	2019		2020		2021		2021
	RMB		RMB		RMB		US$
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows used in operating leases		21,092		40,275		41,832		6,564
Operating cash flows used in finance leases		6,599		6,008		5,751		902
Financing cash flows used in finance leases		9,230		18,441		7,723		1,212
Lease liabilities arising from obtaining right-of-use assets
Operating leases		13,044		8,091		23,002		3,610
Finance leases		178		708		—		—

	As of December 31,
	2020			2021
Weighted-average remaining lease term (years)
Operating leases		13.68			12.43
Finance leases		27.07			26.09
Weighted-average discount rate
Operating leases		8.59	%		8.60	%
Finance leases		9.05	%		9.05	%

Summary of Minimum Lease Payments Expected to be Collected

As of December 31, 2021, minimum lease payments expected to be collected were as follows:

	As of December 31, 2021
	RMB		US$
Year ending December 31, 2022		116,332		18,255
Year ending December 31, 2023		222,606		34,932
Year ending December 31, 2024		216,924		34,040
Year ending December 31, 2025		227,801		35,747
Year ending December 31, 2026 and thereafter		841,633		132,071
Total		1,625,296		255,045

Segment Information - Summary of Net Revenues by Geographic Area (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2019 CNY (¥)
Segment Reporting Information [Line Items]
Total net revenue	¥ 2,852,277	$ 447,584	¥ 1,831,077	¥ 853,010
PRC
Segment Reporting Information [Line Items]
Total net revenue	2,737,596	429,588	1,706,086	712,115
Malaysia
Segment Reporting Information [Line Items]
Total net revenue	¥ 114,681	$ 17,996	¥ 124,991	¥ 140,895

- Definition

+ References

+ Details

Condensed Financial Information of the Parent Company

12 Months Ended

Dec. 31, 2021

Condensed Financial Information Of Parent Company Only Disclosure [Abstract]

CONDENSED FINANCIAL INFORMATION OF THE PARENT COMPANY

21. CONDENSED FINANCIAL INFORMATION OF THE PARENT COMPANY

Condensed Balance Sheets

	As of December 31,
	2020			2021			2021
	RMB			RMB			US$
ASSETS
Current assets
Cash and cash equivalents		3,514,736			459,522			72,109
Short-term investments		—			63,726			10,000
Amounts due from subsidiaries of the Group		2,894			2,890			454
Other current assets		—			2,964			465
Total current assets		3,517,630			529,102			83,028
Non-current assets
Investment in and amounts due from subsidiaries of the Group		6,318,785			9,657,859			1,515,528
Other non-current assets		—			595			93
Total non-current assets		6,318,785			9,658,454			1,515,621
Total assets		9,836,415			10,187,556			1,598,649
LIABILITIES AND SHAREHOLDER’S EQUITY
Current liabilities
Amounts due to related parties		36,978			31,600			4,959
Accrued expenses and other payables		28,410			18,721			2,937
Total current liabilities		65,388			50,321			7,896
Non-current liabilities:
Other non-current liabilities		31,559			22,603			3,547
Total non-current liabilities		31,559			22,603			3,547
Total liabilities		96,947			72,924			11,443
Shareholders’ equity
Ordinary shares (par value of US$0.00001 per share,4,500,000,000 Class A ordinary shares authorized, 344,577,783 Class A ordinary shares issued and outstanding; 500,000,000 Class B ordinary shares authorized, 380,214,434 Class B ordinary shares issued and outstanding as of December 31, 2020; 4,500,000,000 Class A ordinary shares authorized, 358,376,753 Class A ordinary shares issued and outstanding, 500,000,000 Class B ordinary shares authorized, 368,500,979 Class B ordinary shares issued and outstanding as of December 31, 2021)		46			46			7
Additional paid-in capital		10,510,516			10,646,328			1,670,641
Statutory reserve		82,792			189,700			29,768
Accumulated other comprehensive loss		(172,586	)		(257,977	)		(40,482	)
Accumulated deficit		(681,300	)		(463,465	)		(72,728	)
Total shareholders’ equity		9,739,468			10,114,632			1,587,206
Total liabilities and shareholders’ equity		9,836,415			10,187,556			1,598,649

21. CONDENSED FINANCIAL INFORMATION OF THE PARENT COMPANY (Continued)

Condensed Statements of Comprehensive (Loss) income

	For the year ended December 31,
	2019			2020			2021			2021
	RMB			RMB			RMB			US$
Operating expenses
Sales and marketing expenses		—			—			(235	)		(37	)
General and administrative expenses		(33,523	)		(53,945	)		(19,900	)		(3,123	)
Total operating expenses		(33,523	)		(53,945	)		(20,135	)		(3,160	)
Operating loss		(33,523	)		(53,945	)		(20,135	)		(3,160	)
Interest income		—			1,854			5,200			816
Interest expense		47			—			—			—
Share of (loss) income of subsidiaries and the VIEs		(140,967	)		(232,287	)		318,481			49,977
Foreign currency exchange (loss) gain		—			(1,193	)		89			14
Changes in fair value of financial instruments		—			—			4,465			701
Others, net		—			2,226			8,320			1,306
Net (loss) income attributable to ordinary shareholders		(174,443	)		(283,345	)		316,420			49,654
Other comprehensive income (loss) (foreign currency translation adjustments), net of tax of nil:		21,967			(212,597	)		(85,391	)		(13,400	)
Comprehensive (loss) income		(152,476	)		(495,942	)		231,029			36,254

21. CONDENSED FINANCIAL INFORMATION OF THE PARENT COMPANY (Continued)

Condensed Statements of Cash Flows

	For the year ended December 31,
	2019			2020			2021			2021
	RMB			RMB			RMB			US$
Net cash used in operating activities		(26,093	)		(22,553	)		(6,049	)		(949	)
Net cash used in investing activities		(601,174	)		(2,893,144	)		(2,887,209	)		(453,066	)
Net cash generated from (used in) financing activities		637,792			6,683,039			(4,285	)		(672	)
Effect of exchange rate changes on cash and cash equivalents		(43	)		(263,088	)		(157,671	)		(24,743	)
Net increase (decrease) in cash and cash equivalents		10,482			3,504,254			(3,055,214	)		(479,430	)
Cash and cash equivalents at beginning of the year		—			10,482			3,514,736			551,539
Cash and cash equivalents at end of the year		10,482			3,514,736			459,522			72,109

Basis of presentation

For the presentation of the parent company only condensed financial information, the Company records its investments in subsidiaries and the VIEs under the equity method of accounting as prescribed in ASC 323, Investments—Equity Method and Joint Ventures. Such investments are presented on the condensed balance sheet as “investments in subsidiaries” and the subsidiaries’ and the VIEs’ losses as “share of losses of subsidiaries and the VIEs” on the condensed statements of comprehensive loss. Under the equity method of accounting, the Company adjusted the carrying amount of “investments in subsidiaries” for its share of the subsidiaries’ and the VIEs’ cumulative losses until the investment balance reaches zero and did not provide for additional losses unless the Company has guaranteed obligations of the subsidiaries’ and the VIEs’ or is otherwise committed to provide further financial support.

The subsidiaries did not pay any dividends to the Company for the periods presented.

The Company does not have significant commitments or long-term obligations as of the period end.

The parent company only financial statements should be read in conjunction with the Company’s consolidated financial statements.

Taxation (Tables)

12 Months Ended

Dec. 31, 2021

Income Tax Disclosure [Abstract]

Summary of (Loss) Income Before Income Taxes

(Loss) income before income taxes consists of:

	For the year ended December 31,
	2019			2020			2021			2021
	RMB			RMB			RMB			US$
PRC		77,079			102,329			677,544			106,321
Non-PRC		(248,522	)		(318,335	)		(206,708	)		(32,437	)
		(171,443	)		(216,006	)		470,836			73,884

Summary of Current and Deferred Components of Income Tax (Benefit) Expense

The current and deferred components of income tax (benefit) expense appearing in the consolidated statements of comprehensive (loss) income are as follows:

	For the year ended December 31,
	2019			2020		2021		2021
	RMB			RMB		RMB		US$
Current income tax expense		631			59,964		147,818		23,196
Deferred income tax (benefit) expense		(2,373	)		7,375		6,598		1,035
		(1,742	)		67,339		154,416		24,231

Schedule of Reconciliation of Differences Between PRC Statutory Tax Rate and Effective Tax Rate for Enterprise Income Tax

A reconciliation of the differences between the PRC statutory tax rate and the Company’s effective tax rate for enterprise income tax is as follows:

	For the year ended December 31,
	2019			2020			2021			2021
	RMB			RMB			RMB			US$
(Loss) income before income tax		(171,443	)		(216,006	)		470,836			73,884
Income tax computed at the PRC statutory tax rate of 25%		(42,861	)		(54,001	)		117,709			18,471
Effect of differing tax rates in different jurisdictions		23,599			35,228			24,378			3,826
Effect of PRC preferential tax rates		(3,346	)		(22,350	)		(30,191	)		(4,738	)
Research and development expense super-deduction		(4,001	)		(7,557	)		(12,232	)		(1,919	)
Effect of tax rate changes on deferred taxes		—			5,325			(6,446	)		(1,012	)
Non-deductible expenses and non-taxable income, net*		384			106,892			57,631			9,043
Change in valuation allowance		24,483			3,802			3,567			560
Income tax (benefit) expense		(1,742	)		67,339			154,416			24,231

*	Primarily represents share-based compensation expense, other non-deductible expenses, and income from entities not subject to income tax.

Schedule of Significant Components of Deferred Tax Assets and Liabilities

The significant components of the Group’s deferred tax assets and liabilities are as follows:

	As of December 31,
	2020		2021		2021
	RMB		RMB		US$
Deferred tax assets
Tax loss carry forward		67,873		89,147		13,989
Unabsorbed capital allowance		63,297		73,567		11,544
Depreciation and amortization expense		23,887		82,957		13,018
Operating lease		60,878		59,748		9,376
Accrued expenses and others		35,245		29,212		4,584
Less: Valuation allowance*		71,229		72,606		11,393
		179,951		262,025		41,118

	As of December 31,
	2020		2021		2021
	RMB		RMB		US$
Deferred tax liabilities
Property and equipment		222,489		329,917		51,771
Acquisition of intangible assets		105,805		86,283		13,540
Debt issuance cost		13,243		15,431		2,421
Operating lease		64,358		63,039		9,892
Others		9,698		7,439		1,168
		415,593		502,109		78,792
Presentation in the consolidated balance sheets:
Deferred tax assets		18,789		30,866		4,844
Deferred tax liabilities		254,431		270,950		42,518
Net deferred tax liabilities		235,642		240,084		37,674

12. TAXATION (Continued)

Reconciliation of Beginning and Ending Amounts of Unrecognized Tax Benefits

A reconciliation of the beginning and ending amount of unrecognized tax benefits was as follows:

	Unrecognized tax benefits
	RMB
Balance as of December 31, 2020		4,478
Increase		59,316
Decrease		(151	)
Balance as of December 31, 2021		63,643
Balance as of December 31, 2021 (US$)		9,987

Condensed Financial Information of the Parent Company - Condensed Balance Sheets (Details) ¥ in Thousands, $ in Thousands	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2018 CNY (¥)
Current assets
Cash and cash equivalents	¥ 4,390,293	$ 688,933	¥ 6,705,612	¥ 1,038,897
Short-term investments	193,672	30,391	0
Total current assets	6,347,323	996,033	7,589,976
Non-current assets
Other non-current assets	342,573	53,755	193,145
Total non-current assets	12,334,628	1,935,572	8,669,622
Total assets	18,681,951	2,931,605	16,259,598
Current liabilities
Amounts due to related parties	38,832	6,094	37,468
Total current liabilities	4,301,347	674,975	1,832,940
Non-current liabilities
Other non-current liabilities	196,400	30,819	260,225
Total non-current liabilities	4,265,972	669,424	4,687,190
Total liabilities	8,567,319	1,344,399	6,520,130
Shareholders’ equity
Ordinary shares	46	7	46
Statutory reserves	189,700	29,768	82,792
Accumulated other comprehensive loss	(257,977)	(40,482)	(172,586)	¥ 40,011	¥ 18,044
Accumulated deficit	(463,465)	(72,728)	(681,300)
Total shareholders’ equity	10,114,632	1,587,206	9,739,468
Total liabilities and shareholders’ equity	18,681,951	2,931,605	16,259,598
Parent Company
Current assets
Cash and cash equivalents	459,522	72,109	3,514,736
Short-term investments	63,726	10,000
Amounts due from subsidiaries of the Group	2,890	454	2,894
Other current assets	2,964	465
Total current assets	529,102	83,028	3,517,630
Non-current assets
Investment in and amounts due from subsidiaries of the Group	9,657,859	1,515,528	6,318,785
Other non-current assets	595	93
Total non-current assets	9,658,454	1,515,621	6,318,785
Total assets	10,187,556	1,598,649	9,836,415
Current liabilities
Amounts due to related parties	31,600	4,959	36,978
Accrued expenses and other payables	18,721	2,937	28,410
Total current liabilities	50,321	7,896	65,388
Non-current liabilities
Other non-current liabilities	22,603	3,547	31,559
Total non-current liabilities	22,603	3,547	31,559
Total liabilities	72,924	11,443	96,947
Shareholders’ equity
Ordinary shares	46	7	46
Additional paid-in capital	10,646,328	1,670,641	10,510,516
Statutory reserves	189,700	29,768	82,792
Accumulated other comprehensive loss	(257,977)	(40,482)	(172,586)
Accumulated deficit	(463,465)	(72,728)	(681,300)
Total shareholders’ equity	10,114,632	1,587,206	9,739,468
Total liabilities and shareholders’ equity	¥ 10,187,556	$ 1,598,649	¥ 9,836,415

Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2021

Accounting Policies [Abstract]

Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Fair value measurements (Continued)

Assets and liabilities measured at fair value on a recurring basis as of December 31, 2020 are summarized below:

	Quoted price in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
	RMB		RMB		RMB
Derivative liabilities		—		24,794		—
Contingent receivable		—		—		13,609

Assets and liabilities measured at fair value on a recurring basis as of December 31, 2021 are summarized below:

	Quoted price in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
	RMB		RMB		RMB
Short-term investments
Trading securities		129,946		—		—
Held-to-maturity debt securities		—		63,726		—
Derivative assets		—		2,446		—
Derivative liabilities		—		16,354		—

Schedule of Reconciliation of all financial Instruments Measured at Fair Value on a Recurring Basis Using Level 3 Unobservable Inputs

The following table presents a reconciliation of all financial instruments measured at fair value on a recurring basis using Level 3 unobservable inputs:

	Contingent receivable
	RMB
Balance as of January 1, 2020		14,630
Settlement		(8,783	)
Fair value change		7,762
Balance as of December 31, 2020		13,609
Fair value change		5,884
Settlement		(19,493	)
Balance as of December 31, 2021		—
The amount of total gain for the year ended December 31, 2021		5,884
The amount of total gain for the year ended December 31, 2021 (US$)		923

Schedule of Property Plant and Equipment Estimated Useful Lives of Assets

Property and equipment are stated at cost and are depreciated using the straight-line method over the estimated useful lives of the assets, as follows:

Category		Estimated Useful Life
Buildings		20 to 40 years
Data center equipment
– Machinery		10 to 20 years
– Other equipment		3 to 5 years
Furniture and office equipment		3 to 5 years
Computers and network equipment		3 to 5 years
Motor vehicles		3 to 10 years
Purchased software		5 to 10 years
Leasehold improvements		Lesser of useful life or lease term

Schedule of Estimated Useful Life for Intangible Assets

The estimated useful life for the intangible assets is as follows:

Category		Estimated Useful Life
Acquired customer relationships		5 to 10 years
Acquired license and others		2 to 4 years

Goodwill (Tables)

12 Months Ended

Dec. 31, 2021

Goodwill And Intangible Assets Disclosure [Abstract]

Summary of Goodwill

	Stack Group
Balance as of January 1, 2020		466,320
Goodwill acquired (Note 17)		6,563
Balance as of December 31, 2020 and 2021		472,883
Balance as of December 31, 2021 (US$)		74,206

Condensed Financial Information of the Parent Company - Condensed Balance Sheets (Parenthetical) (Details) - $ / shares	Dec. 31, 2021	Dec. 31, 2020
Condensed Financial Statements Captions [Line Items]
Common stock, par value per share	$ 0.00001
Class A Ordinary Shares
Condensed Financial Statements Captions [Line Items]
Common stock, shares authorized	4,500,000,000	4,500,000,000
Common stock, shares, issued	358,376,753	344,577,783
Common stock, value, outstanding	358,376,753	344,577,783
Class B Ordinary Shares
Condensed Financial Statements Captions [Line Items]
Common stock, shares authorized	500,000,000	500,000,000
Common stock, shares, issued	368,500,979	380,214,434
Common stock, value, outstanding	368,500,979	380,214,434
Parent Company
Condensed Financial Statements Captions [Line Items]
Common stock, par value per share	$ 0.00001
Parent Company \| Class A Ordinary Shares
Condensed Financial Statements Captions [Line Items]
Common stock, shares authorized	4,500,000,000	4,500,000,000
Common stock, shares, issued	358,376,753	344,577,783
Common stock, value, outstanding	358,376,753	344,577,783
Parent Company \| Class B Ordinary Shares
Condensed Financial Statements Captions [Line Items]
Common stock, shares authorized	500,000,000	500,000,000
Common stock, shares, issued	368,500,979	380,214,434
Common stock, value, outstanding	368,500,979	380,214,434

Summary of Significant Accounting Policies

12 Months Ended

Dec. 31, 2021

Accounting Policies [Abstract]

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Basis of Presentation

The consolidated financial statements have been prepared in accordance with United States generally accepted accounting principles (“U.S. GAAP”).

Principles of Consolidation

Use of estimates

Comparative Information

Certain line items in the financial information of the VIEs presented in Note 1 have been adjusted to conform with the current year’s presentation to facilitate comparison.

Convenience translation

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Foreign currency

Cash and cash equivalents

Restricted cash

Restricted cash primarily represent cash and cash equivalents, pledged as security for the Group’s bank loans.

Short-term investment

Accounts receivable

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Capitalized interest

Derivative instruments

Fair value measurements

ASC 820 establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value as follows:

Level 1 — Observable inputs that reflect quoted prices (unadjusted) for identical assets or liabilities in active markets.

Level 2 — Include other inputs that are directly or indirectly observable in the marketplace.

Level 3 — Unobservable inputs which are supported by little or no market activity.

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Fair value measurements (Continued)

Assets and liabilities measured at fair value on a recurring basis as of December 31, 2020 are summarized below:

	Quoted price in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
	RMB		RMB		RMB
Derivative liabilities		—		24,794		—
Contingent receivable		—		—		13,609

Assets and liabilities measured at fair value on a recurring basis as of December 31, 2021 are summarized below:

	Quoted price in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
	RMB		RMB		RMB
Short-term investments
Trading securities		129,946		—		—
Held-to-maturity debt securities		—		63,726		—
Derivative assets		—		2,446		—
Derivative liabilities		—		16,354		—

The following table presents a reconciliation of all financial instruments measured at fair value on a recurring basis using Level 3 unobservable inputs:

	Contingent receivable
	RMB
Balance as of January 1, 2020		14,630
Settlement		(8,783	)
Fair value change		7,762
Balance as of December 31, 2020		13,609
Fair value change		5,884
Settlement		(19,493	)
Balance as of December 31, 2021		—
The amount of total gain for the year ended December 31, 2021		5,884
The amount of total gain for the year ended December 31, 2021 (US$)		923

The Group did not transfer any assets or liabilities in or out of Level 3 during all periods presented.

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Equity method investments

Property and equipment, net

Property and equipment are stated at cost and are depreciated using the straight-line method over the estimated useful lives of the assets, as follows:

Category		Estimated Useful Life
Buildings		20 to 40 years
Data center equipment
– Machinery		10 to 20 years
– Other equipment		3 to 5 years
Furniture and office equipment		3 to 5 years
Computers and network equipment		3 to 5 years
Motor vehicles		3 to 10 years
Purchased software		5 to 10 years
Leasehold improvements		Lesser of useful life or lease term

Inventories

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Intangible assets, net

Category		Estimated Useful Life
Acquired customer relationships		5 to 10 years
Acquired license and others		2 to 4 years

Impairment of long-lived assets other than goodwill

Segment reporting

Business combinations

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Goodwill

Comprehensive (loss) income

Leases

Lessee accounting

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Lessor accounting

Revenue recognition

Colocation services

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Revenue recognition (Continued)

Colocation rental

Others

Value-Added Taxes Recoverable

Cost of revenues

Research and development expense

Government grants

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Share-based compensation

Employee benefit expenses

The Group has no further payment obligations once the contributions have been paid.

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

(Loss) earnings per share

Income taxes

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Contingencies

Concentration of risks

Concentration of credit risk

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Concentration of risks (Continued)

Business, customer, political, social and economic risks

Interest rate risk

Currency convertibility risk

Foreign currency exchange rate risk

Recent accounting pronouncements

Taxation - Summary of Current and Deferred Components of Income Tax (Benefit) Expense (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2019 CNY (¥)
Income Tax Disclosure [Abstract]
Current income tax expense	¥ 147,818	$ 23,196	¥ 59,964	¥ 631
Deferred income taxes	6,598	1,035	7,375	(2,373)
Income tax (benefit) expense	¥ 154,416	$ 24,231	¥ 67,339	¥ (1,742)

- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References + Details