v3.26.1
Investments - Investment in equity investees (Details)
12 Months Ended
Dec. 31, 2025
CNY (¥)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
CNY (¥)
Schedule of Equity Method Investments [Line Items]      
Investment in equity investees ¥ 11,062,659   ¥ 76,929,667
Fair value change in investment in equity investees (65,200,488) $ (9,323,546) 40,628,028
NIP Group Inc.      
Schedule of Equity Method Investments [Line Items]      
Investment in equity investees ¥ 11,062,659   ¥ 76,929,667