XML 186 R168.htm IDEA: XBRL DOCUMENT v3.23.1
Deferred income tax - Deferred tax offsetting (Details) - CNY (¥)
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Offsetting of deferred tax assets and deferred tax liabilities    
Deferred tax assets and liabilities after offsetting ¥ 0 ¥ 0