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Taxation - Summary of Significant Components of Deferred Tax Assets (Detail) - CNY (¥)
¥ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Deferred Tax Assets, Net of Valuation Allowance [Abstract]        
Net operating tax loss carry forwards ¥ 112,248 ¥ 72,988    
Advertising expenses in excess of deduction limit 63 709    
Deferred revenue 527 910    
Total deferred tax assets 112,838 74,607    
Less: valuation allowances (112,838) ¥ (74,607) ¥ (80,320) ¥ (50,499)
Net deferred tax assets ¥ 0