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Property and Equipment, Net - Schedule of Property and Equipment, Net (Detail)
¥ in Thousands, $ in Thousands
Dec. 31, 2019
USD ($)
Dec. 31, 2019
CNY (¥)
Dec. 31, 2018
CNY (¥)
Property, Plant and Equipment [Line Items]      
Less: accumulated depreciation   ¥ (530,439) ¥ (338,868)
Exchange difference   (16) (35)
Total $ 49,749 346,345 387,532
Computer Equipment [Member]      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross   623,482 513,448
Office Equipment [Member]      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross   150,048 115,048
Vehicles [Member]      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross   3,599 3,599
Leasehold Improvement [Member]      
Property, Plant and Equipment [Line Items]      
Property and equipment, gross   ¥ 99,671 ¥ 94,340