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Treasury shares - Additional Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2024 CNY (¥) shares	Dec. 31, 2024 USD ($) shares	Dec. 31, 2023 CNY (¥) shares	Dec. 31, 2022 CNY (¥)
Disclosure of Treasury Shares [line items]
Purchased of ordinary shares	3,339,968	3,339,968	0
Purchase of treasury shares	¥ 285,600,000	$ 39,800	¥ 0	¥ 0

X

- Definition

Disclosure of treasury shares.

+ References

No definition available.

+ Details

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X

- Definition

Ordinary shares purchased.

+ References

No definition available.

+ Details

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X

- Definition

The cash outflow to reacquire common stock during the period.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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