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Other non-operating (expenses) income (Details) ¥ in Thousands, $ in Thousands	1 Months Ended	12 Months Ended
	Jan. 31, 2022 CNY (¥)	Dec. 31, 2024 CNY (¥)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 CNY (¥)	Dec. 31, 2022 CNY (¥)
Other Income and Expenses [Abstract]
Change in fair value of an equity security (Note 9)		¥ (44,019)	$ (6,031)	¥ (22,451)	¥ (16,843)
Gains on sale of an equity security (Note 9)		0	0	0	59,728
Gains on deconsolidation of a subsidiary (Note 9)	¥ 71,974	0	0	0	71,974
Gain due to change in fair value RMB		(3,431)	(470)	11,719	(3,245)
Government grants		20,168		11,844	59,393
Foreign currency exchange (losses)/gains		(7,613)		(10,637)	(18,216)
Total other non-operating income (expenses)		¥ (34,895)	$ (4,781)	¥ (9,525)	¥ 152,791

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- Definition

Amount of gain (loss) from deconsolidation of subsidiary and derecognition of group of assets constituting transfer of business or nonprofit activity, excluding conveyance of oil and gas mineral rights and transfer of good or service in contract with customer.

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