v3.26.1
Equity settled share-based payments - Movements in the number of restricted shares (Details) - Restricted shares
12 Months Ended
Jul. 10, 2025
shares
Dec. 31, 2025
USD ($)
shares
Dec. 31, 2025
CNY (¥)
shares
Equity settled share-based payments      
Restricted stock granted | shares 85,016,800 85,016,800 85,016,800
Number of shares, outstanding at the end | shares   85,016,800 85,016,800
Granted | $   $ 1.1137  
Outstanding as of ending | $   1.1137  
Aggregate fair value of restricted shares   $ 94,682,000 ¥ 677,074,000