v3.26.1
Share-based Compensation - Share options, additional information (Details)
12 Months Ended
Dec. 31, 2025
$ / shares
Dec. 31, 2024
$ / shares
Dec. 31, 2023
$ / shares
Dec. 31, 2025
CNY (¥)
Employee Stock Option        
Share Options        
Weighted-average grant date fair value of options granted (US$ per share) $ 0 $ 0 $ 0  
Unrecognized share-based compensation for options | ¥       ¥ 0
Ordinary Shares        
Share Options        
Closing stock price (US$ per share) 0.04      
ADS        
Share Options        
Closing stock price (US$ per share) $ 1.67