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Segment information and revenue - Major customers service fees charged on loans facilitated (Details) - Fees generated on loans facilitated
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disaggregation of revenue from contracts with customers      
Percentage of entity's revenue 66.31% 66.42% 62.49%
Ping An Group and its subsidiaries [Member]      
Disaggregation of revenue from contracts with customers      
Percentage of entity's revenue 56.60% 56.06% 52.13%
Lufax and its subsidiaries      
Disaggregation of revenue from contracts with customers      
Percentage of entity's revenue 9.71% 10.36% 10.36%