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Fair value measurement (Details) - Recurring - CNY (¥) ¥ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Assets
Total Assets	¥ 2,000	¥ 6,150
Wealth management products
Assets
Short-term investments	2,000	6,150
Level 2
Assets
Total Assets	2,000	6,150
Level 2 | Wealth management products
Assets
Short-term investments	¥ 2,000	¥ 6,150

X

- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
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- Definition

Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
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