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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME /(LOSS) (Parenthetical)
12 Months Ended
Dec. 31, 2024
CNY (¥)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
CNY (¥)
Dec. 31, 2022
CNY (¥)
Changes in guarantee liabilities ¥ 0 $ 0 ¥ 0 ¥ 37,120,954
Changes in risk assurance liabilities ¥ 0 $ 0 ¥ 0 ¥ 66,870,069
Class A ordinary shares        
Number of underlying shares represented by one ADS 1 1 1 1