v3.25.2
Material accounting policies - Additional Information (Details)
12 Months Ended
Dec. 31, 2024
¥ / $
segment
Material accounting policies  
Number of operating segment 1
Number of reportable segment 1
Lease Term 12 months
Buying rate (RMB/US$) | ¥ / $ 7.2993
Bottom of range  
Material accounting policies  
Proportion of ownership interest in associate 20.00%
Lease Term 3 months
Top of Range  
Material accounting policies  
Proportion of ownership interest in associate 50.00%
Lease Term 5 years