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Depreciation, amortization, shipping and handling expenses - Summary of Staff Costs (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022 CNY (¥)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 CNY (¥)	Dec. 31, 2020 CNY (¥)
Disclosure of income statement [line items]
Wages and salaries	¥ 928,350	$ 133,539	¥ 1,338,777	¥ 1,364,751
Contribution to defined contribution plans	371,458	53,433	386,551	287,830
Executive bonuses	16,500	2,373	19,355	59,908
Staff welfare	79,206	11,393	93,992	94,982
Staff severance cost	19,531	2,809	11,771	19,712
Others	3,875	557	4,887	3,439
Staff costs	¥ 1,418,920	$ 204,104	¥ 1,855,333	¥ 1,830,622

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Disclosure of income statement [line items]

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Executive bonus payments.

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Staff severance costs.

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Staff welfare cost.

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- Definition

The expense of all forms of consideration given by an entity in exchange for a service rendered by employees or for the termination of employment.

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The amount of employee expenses that the entity does not separately disclose in the same statement or note.

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The amount of post-employment benefit expense relating to defined contribution plans. Defined contribution plans are post-employment benefit plans under which an entity pays fixed contributions into a separate entity (a fund) and will have no legal or constructive obligation to pay further contributions if the fund does not hold sufficient assets to pay all employee benefits relating to employee service in the current and prior periods.

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A class of employee benefits expense that represents wages and salaries. [Refer: Employee benefits expense]

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