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Restricted Net Assets - Additional Information (Details) ¥ in Thousands, $ in Thousands	6 Months Ended
	Jun. 30, 2021 CNY (¥)	Jun. 30, 2021 USD ($)	Dec. 31, 2020 CNY (¥)
Dividends Payable [Line Items]
Threshold limit percentage of registered capital	50.00%
PRC | VIE
Dividends Payable [Line Items]
Restricted net asset, using statutory accounting principles	¥ 580,919	$ 89,973	¥ 616,559
Minimum
Dividends Payable [Line Items]
Minimum percentage of net profit to be allocated to statutory reserve fund	10.00%

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Threshold limit percentage of registered capital.

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- Definition

Amount of statutory capital and surplus computed using prescribed or permitted statutory accounting practice.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 505
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6486098&loc=d3e24708-158529

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