v3.26.1
Equity Linked Securities, lower strike call option and upper strike warrant - Lower strike call option (Details) - Lower strike call option - Financial assets measured at FVTPL
12 Months Ended
Dec. 31, 2025
CNY (¥)
Jan. 31, 2025
USD ($)
Jan. 31, 2025
CNY (¥)
Other investments      
Fair value of option at issuance   $ 168,029,906 ¥ 1,207,782,000
Issuance of the lower strike call option ¥ 1,207,782    
Fair value changes for the year (413,481)    
Exchange adjustment (20,198)    
Balance at the end of year ¥ 774,103