v3.26.3
Related party transactions (Details) - Newlink Technology Limited [Member] - CNY (¥)
¥ in Millions
6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Related party transactions (Details) [Line Items]    
Related party transaction newlink paid a total ¥ 9.7  
Related party transaction as payroll and non-payroll labor expenses 0.9  
Related party transaction rental fees 0.7  
Related party other expenses 8.1  
Additional paid-in capital one member    
Related party transactions (Details) [Line Items]    
Share-based compensation from controlling shareholder ESOP ¥ 3.2 ¥ 0.7