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Income tax - Composition of income tax expenses (Details) - CNY (¥) ¥ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income tax
Current income tax expense	¥ 195	¥ (471)	¥ 200
Total income tax expense/ (benefits)	¥ 195	¥ (471)	¥ 200

X

- Definition

Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.

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- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

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