v3.26.1
Leases - Schedule of Operating Lease (Details)
12 Months Ended
Dec. 31, 2025
CNY (¥)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
CNY (¥)
Dec. 31, 2023
CNY (¥)
Dec. 31, 2025
USD ($)
Schedule of Operating Lease [Abstract]          
Right-of-use assets ¥ 6,350,997   ¥ 3,739,296   $ 903,568
Less: impairment (512,701)   (1,857,761)   (72,943)
Right-of-use assets 5,838,296   1,881,535   830,625
Operating lease liabilities – current 2,281,725   812,669   324,625
Operating lease liabilities – non-current 4,403,452   1,898,004   626,487
Total operating lease liabilities 6,685,177   2,710,673   $ 951,112
Beginning balance 1,857,761 $ 264,307 3,244,676    
Addition    
Derecognition (1,345,060) (191,364) (1,386,915)    
Ending balance ¥ 512,701 72,943 1,857,761 ¥ 3,244,676  
Weighted average remaining lease term (years) 4 years 21 days       4 years 21 days
Weighted average discount rate 3.62%       3.62%
Lease expense          
Operating lease expense ¥ 1,374,121 195,499 3,887,462    
Short-term lease expense 24,304,964 3,457,911 19,401,914    
Sublease income (14,153,470) (2,013,640) (11,725,219) [1] ¥ (707,009)  
Total lease expense 11,525,615 1,639,770 11,564,157    
Other information          
Cash paid for operating leases 1,309,059 186,242 5,561,964    
Right-of-use assets obtained in exchange for operating new lease liabilities ¥ 5,201,567 $ 740,036 ¥ 2,272,088    
[1] For the years ended December 31, 2023, 2024 and 2025, the Group incurred sublease income of RMB707,009, RMB11,725,219 and RMB14,153,470 (US$2,013,640), and sublease cost of RMB858,098, RMB11,088,503 and RMB12,013,832 (US$1,709,229), respectively.