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Trade receivable (Details) - CNY (¥)
¥ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Trade receivable    
Trade receivable - Related party ¥ 1,795 ¥ 1,658
Trade receivable - Non-related party 14,883 10,910
Trade Receivables ¥ 16,678 ¥ 12,568