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Treasury shares - Summary of Treasury shares (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2024 CNY (¥)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 CNY (¥)
Disclosure of Treasury Shares [abstract]
At January 1	¥ 0	$ 0	¥ 0
Addition	285,561	39,806	0
At December 31	¥ 285,561	$ 39,806	¥ 0

X

- Definition

Disclosure of treasury shares [abstract]

+ References

No definition available.

+ Details

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X

- Definition

The decrease in equity resulting from the purchase of treasury shares. [Refer: Treasury shares]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-IssueDate 2024-01-01
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X

- Definition

An entity’s own equity instruments, held by the entity or other members of the consolidated group.

+ References

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