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Lease (Details 3) - CNY (¥)
¥ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Lease    
Amortization of right-of-use assets ¥ 520 ¥ 250
Interest expense ¥ 39 ¥ 17
Weighted-average remaining lease term 1 year 9 months 18 days
Weighted-average discount rate 3.95% 4.75%