v3.26.1
Subsequent events (Details) - Subsequent events
¥ in Thousands, $ in Thousands
1 Months Ended 4 Months Ended
Apr. 30, 2026
CNY (¥)
Apr. 30, 2026
CNY (¥)
Apr. 30, 2026
USD ($)
Subsequent events      
Related party loan from management ¥ 1,100 ¥ 1,100 $ 157
Percentage of annual interest on loan 6.00%    
Loans to repaid within the maturity   1 year