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Customer deposits (Details) - CNY (¥)
¥ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Customer deposits    
Current and savings accounts ¥ 243,231 ¥ 1,350,171
Fixed deposit 1,685,952  
Customer deposits ¥ 1,929,183 ¥ 1,350,171