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Related Party Balances and Transactions - Summary of Amount Incurred by the Group (Detail) - CNY (¥)
¥ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
PP Credit Data Service Shanghai Company Limited [Member] | Data Collection Service [Member]      
Related Party Transaction [Line Items]      
Data collection service expense ¥ 43,494 ¥ 109,666 ¥ 84,362