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Cash cash equivalents and restricted cash (Details) - CNY (¥)
¥ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Cash on hand ¥ 41 ¥ 41
Cash at bank 38 2,325
Restricted cash at bank 0 167
Cash, cash equivalents and restricted cash per consolidated statements of cash flow ¥ 79 ¥ 2,533