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Subsequent events	12 Months Ended
	Dec. 31, 2022
Subsequent events
Subsequent events	29 Subsequent events In January 2023, the Company approved to grant a total number of 63,464 share options to certain employees at an exercise price of US$9.70 per option. On March 6, 2023, the board of directors resolved to approve the appointment of Mr. Jun Hong Heng, an independent director of the Company, as an additional member of the audit committee, since then, the audit committee has been consisted of three members, namely Ms. Grace Hui Tang, Mr. Jim Zhang (Zhang Xingsheng) and Mr. Jun Hong Heng with Ms. Grace Hui Tang being the chairman. The board also resolved to approve the grants of options, which are share-settleable for a fixed monetary amount of US$160,000, to each of the three audit committee members on March 30, 2023 (“Grant date”). All the options will vest one year after the Grant Date. ​

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- Definition

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-URI https://asc.fasb.org/topic&trid=2122774

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=6842918&loc=SL6314017-165662

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