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Share-based compensation - Share-based compensation expense (Details) - CNY (¥) ¥ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-based compensation recognized in operating expenses
Total share-based compensation expenses	¥ 17,393	¥ 31,899	¥ 183,349
Fulfillment
Share-based compensation recognized in operating expenses
Total share-based compensation expenses	195	585	2,154
Sales and marketing
Share-based compensation recognized in operating expenses
Total share-based compensation expenses	4,682	5,935	8,204
Research and development
Share-based compensation recognized in operating expenses
Total share-based compensation expenses	3,070	3,883	10,134
General and administrative
Share-based compensation recognized in operating expenses
Total share-based compensation expenses	¥ 9,446	¥ 21,496	¥ 162,857

X

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479830/718-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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- Definition

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+ References

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