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Summary of significant accounting policies (Tables)

12 Months Ended

Dec. 31, 2023

Summary of significant accounting policies

Schedule of estimated useful lives of the various classes of assets

​

​	​	​
Furniture and office equipment		3 – 5 years
Machinery	​	5 – 10 years
Vehicles	​	3 – 5 years
Computer equipment	​	3 – 5 years
Leasehold improvement	​	shorter of remaining lease period and estimated useful life

Schedule of estimated useful lives of intangible assets

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​	​	​
Trademarks		10 years
Patent right	​	10 years
Software	​	3 – 5 years
Customer relationship	​	10 years

Schedule of supplier finance program

​

​	​	​	​	​
​		Year ended December 31,
​	​	2022	​	2023
​	​	RMB	​	RMB
​	​	​	​	​
Balance at the beginning of the year		228,104		186,261
Invoices confirmed during the year		392,323		621,071
Confirmed invoices paid during the year		(434,166)		(585,809)
Balance at the end of the year		186,261		221,523

​

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Tabular disclosure of supplier finance program.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 405
-SubTopic 50
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479468/405-50-50-3

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-Topic 405
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-Name Accounting Standards Codification
-Section 55
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