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Trade payable (Details) - CNY (¥)
¥ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Trade payable    
Trade Payable ¥ 2,422 ¥ 1,302
Trade Payable [Member]    
Trade payable    
Trade Payable ¥ 2,422 ¥ 1,302