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Long-term equity investment, net (Details) ¥ in Thousands, $ in Thousands			12 Months Ended
	Sep. 05, 2018 CNY (¥) shares	Jul. 07, 2018 CNY (¥) shares	Dec. 31, 2022 CNY (¥)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 CNY (¥)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2019 CNY (¥)
Long-term equity investment, net
Impairment loss for long-term equity investment			¥ 8,000	$ 1,160	¥ 26,000	¥ 0	¥ 16,000
Impairment loss for long-term equity investment			62,623
Haofangtong
Long-term equity investment, net
Number of shares purchased equity securities without readily determinable fair value | shares	4,029,543
Ownership percentage acquired	7.00%
Consideration for purchase of financial instruments	¥ 56,000
Percentage ownership for additional shares that can be purchased equity securities without readily determinable fair value	19.00%
Purchase price set for additional shares that can be purchased equity securities without readily determinable fair value	¥ 32,000
Haofangtong | Scenario, Plan
Long-term equity investment, net
Expected cumulative percentage ownership after all transactions		26.00%
Number of shares purchased equity securities without readily determinable fair value | shares		4,029,543
Ownership percentage acquired		7.00%
Consideration for purchase of financial instruments		¥ 56,000
Number of additional shares that can be purchased equity securities without readily determinable fair value | shares		10,937,339
Percentage ownership for additional shares that can be purchased equity securities without readily determinable fair value		19.00%
Purchase price set for additional shares that can be purchased equity securities without readily determinable fair value		¥ 32,000
Impairment loss for long-term equity investment					¥ 26,000
Impairment loss for long-term equity investment			¥ 8,000

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This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the equity method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value subject to the equity accounting method. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Publisher FASB
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