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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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