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Significant Accounting Policies - Statutory reserves (Details) - CNY (¥) ¥ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Significant Accounting Policies
Appropriations to general reserve funds and statutory surplus funds	¥ 11,552	¥ 6,737	¥ 4,421
Minimum
Significant Accounting Policies
After tax profit to be transferred to statutory surplus fund (as a percent)	10.00%
After tax profit to be transferred to general reserve fund (as a percent)	10.00%
Maximum
Significant Accounting Policies
Limit of surplus fund as a percentage of registered capital, beyond which no further appropriation is required	50.00%
Limit of general reserve fund as a percentage of registered capital, beyond which no further appropriation is required	50.00%

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- Definition

Amount of appropriations made to general reserve funds and statutory surplus funds.

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Limit of general reserve fund as a percentage of registered capital, beyond which no further appropriation is required.

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Percentage of profit to be appropriated to general reserve fund.

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Percentage of profit after tax to be appropriated as statutory surplus fund.

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Limit of surplus fund as a percentage of registered capital, beyond which no further appropriation is required.

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