Related Party Transactions (Details) - CNY (¥) ¥ in Thousands	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Related Party Transactions
Revenue from Contract with Customer, Excluding Assessed Tax	¥ 340,185	¥ 322,497	¥ 316,779
Related parties \| Beijing Sanke
Related Party Transactions
Revenue from Contract with Customer, Excluding Assessed Tax	1,000	300
Amount due	50	200
Related parties \| Shanghai Xuanke
Related Party Transactions
Revenue from Contract with Customer, Excluding Assessed Tax			2,000
Interest income amounted		3	47
Other receivables recognized after the liquidation	200	20	1,200
Purchases from related party	¥ 49	¥ 300	¥ 1,100

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 924
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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Reference 10: http://www.xbrl.org/2003/role/disclosureRef
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Reference 11: http://www.xbrl.org/2003/role/disclosureRef
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+ Details