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Leases (Details)
12 Months Ended
Dec. 31, 2023
CNY (¥)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
CNY (¥)
Dec. 31, 2021
CNY (¥)
Leases [Line Items]        
Sublease income ¥ 707,009 $ 99,822    
Sublease cost 858,098 121,154    
Total operating lease expenses 24,498,055 3,458,858 ¥ 10,933,292 ¥ 3,498,048
Lease termination loss ¥ (478,933) $ (67,620)