v3.26.1
Investments - Schedule of investments accounted for under equity method (Parenthetical) (Details)
12 Months Ended
Dec. 31, 2025
CNY (¥)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
CNY (¥)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
CNY (¥)
Dec. 31, 2023
USD ($)
Marketable Securities            
Share of loss in equity method investments ¥ (1,927,859) $ (275,680) ¥ (4,001,129)   ¥ (31,610,752)  
Wuhan Shayu Network Technology Co., Ltd. ("Shayu")            
Marketable Securities            
Percentage of equity method investment acquired 35.084%          
Equity method investment, Amount agreed to invest ¥ 188,009,650          
Share of loss in equity method investments 1,846,200   7,818,684   (28,046,644)  
Nanshan Stellar Investment LLP ("Nanshan LLP")            
Marketable Securities            
Share of loss in equity method investments ¥ 515,450 $ 3,622,995 ¥ 382,211 $ 2,789,872 ¥ 1,426 $ 10,052