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Property, Equipment and Software, Net - Schedule of Property, Equipment and Software, Net (Parenthetical) (Detail)
¥ in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2019
CNY (¥)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
CNY (¥)
Dec. 31, 2017
CNY (¥)
Property, Plant and Equipment [Abstract]        
Depreciation and amortization ¥ 57,712 $ 8,290 ¥ 42,162 ¥ 22,555