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Taxation - Summary of Operating Loss Carry Forward (Details) - CNY (¥)
¥ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Taxation    
Operating loss carryforwards ¥ 108,601 ¥ 112,248
Loss expiring in 2023    
Taxation    
Operating loss carryforwards 3,238  
Loss expiring in 2024    
Taxation    
Operating loss carryforwards 14,186  
Loss expiring in 2025    
Taxation    
Operating loss carryforwards 18,996  
Loss expiring in 2026    
Taxation    
Operating loss carryforwards 43,579  
Loss expiring in 2027    
Taxation    
Operating loss carryforwards 28,366  
Loss expiring in 2028    
Taxation    
Operating loss carryforwards 47,863  
Loss expiring in 2029    
Taxation    
Operating loss carryforwards 156,879  
Loss expiring in 2030    
Taxation    
Operating loss carryforwards 156,066  
Loss expiring in 2031    
Taxation    
Operating loss carryforwards 207,664  
Loss expiring in 2032    
Taxation    
Operating loss carryforwards 14,027  
Operating loss carry forwards    
Taxation    
Operating loss carryforwards ¥ 690,864