XML 104 R86.htm IDEA: XBRL DOCUMENT v3.23.1
Summary of significant accounting policies - Impairment of non financial assets and Intangible assets (Details) - CNY (¥)
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Intangible assets    
Impairment loss   ¥ 0
Application And Platform [Member] | Bottom of range [Member]    
Intangible assets    
Useful life 3 years  
Computer software [member] | Bottom of range [Member]    
Intangible assets    
Useful life 3 years  
Computer software [member] | Top of range [Member]    
Intangible assets    
Useful life 10 years  
Licences [member] | Bottom of range [Member]    
Intangible assets    
Useful life 3 years  
Licences [member] | Top of range [Member]    
Intangible assets    
Useful life 5 years