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Concentration (Details) - Schedule of total revenue of the customer
Dec. 31, 2022
CNY (¥)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
CNY (¥)
Dec. 31, 2020
CNY (¥)
Customer B [Member]        
Concentration (Details) - Schedule of total revenue of the customer [Line Items]        
Total revenue [1] [1] [1] ¥ 51,976,003
Percentage of total revenue [1] [1] [1] 17.90%
Customer G [Member]        
Concentration (Details) - Schedule of total revenue of the customer [Line Items]        
Total revenue [1] [1] [1] ¥ 45,373,496
Percentage of total revenue [1] [1] [1] 15.60%
Customer H [Member]        
Concentration (Details) - Schedule of total revenue of the customer [Line Items]        
Total revenue [1] [1] [1] ¥ 31,095,213
Percentage of total revenue [1] [1] [1] 10.70%
Customer F [Member]        
Concentration (Details) - Schedule of total revenue of the customer [Line Items]        
Total revenue ¥ 117,415,978 $ 16,864,138 [1] [1]
Percentage of total revenue 18.00% 18.00% [1] [1]
Customer E [Member]        
Concentration (Details) - Schedule of total revenue of the customer [Line Items]        
Total revenue ¥ 73,423,394 $ 10,542,371 ¥ 71,419,145 [1]
Percentage of total revenue 11.30% 11.30% 13.10% [1]
[1] Represented the percentage below 10%