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Share-based Compensation - Share-based compensation expense (Detail)
12 Months Ended
Dec. 31, 2024
CNY (¥)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
CNY (¥)
Dec. 31, 2022
CNY (¥)
Share-based compensation        
Share-based compensation expense ¥ 2,257,795 $ 309,317 ¥ 4,935,782 ¥ 24,053,760
Sales and marketing        
Share-based compensation        
Share-based compensation expense 299,806 41,073 265,862 527,537
General and administrative        
Share-based compensation        
Share-based compensation expense 1,754,168 240,320 4,649,664 21,102,104
Research and development        
Share-based compensation        
Share-based compensation expense ¥ 203,821 $ 27,924 ¥ 20,256 ¥ 2,424,119