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Leases - Summary of lease cost (Detail)
¥ in Thousands
12 Months Ended
Dec. 31, 2019
CNY (¥)
Lease, Cost [Abstract]  
Amortization of right-of-use assets ¥ 44,190
Interest of lease liabilities 5,183
Expenses for short-term leases within 12 months 1,499
Total lease cost ¥ 50,872