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Taxation - Summary of Significant Components of Deferred Tax Assets (Details) - CNY (¥)
¥ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Taxation        
Net operating tax loss carry forwards ¥ 108,601 ¥ 112,248    
Advertising expenses in excess of deduction limit   63    
Deferred revenue   527    
Total deferred tax assets 108,601 112,838    
Less: valuation allowances ¥ (108,601) ¥ (112,838) ¥ (74,607) ¥ (80,320)