v3.26.1
Principal Accounting Policies - Revenue recognition (Details) - CNY (¥)
¥ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Accounting Policies [Abstract]      
Revenues recognized from noncash transactions ¥ 8.6 ¥ 6.4 ¥ 7.7