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Restricted Net Assets - Additional Information (Detail)
¥ in Thousands
12 Months Ended
Dec. 31, 2019
CNY (¥)
Restrictions for Consolidated and Unconsolidated Subsidiaries [Abstract]  
Percentage of annual appropriations net of tax income prior to payment of dividends as the statutory general reserve 10.00%
Restricted net assets ¥ 4,577,602
Percentage of restricted net assets 57.10%