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Redeemable noncontrolling interests - Summary of Redeemable noncontrolling Interests Balance (Detail) - 12 months ended Dec. 31, 2022 ¥ in Thousands, $ in Thousands	CNY (¥)	USD ($)
Noncontrolling Interest [Abstract]
Balance as of January 1, 2022	¥ 0	$ 0
Initial fair value of redeemable noncontrolling interests	31,397	4,552
Net loss attributable to redeemable noncontrolling interest	(1,486)	(215)
Adjustment of redeemable noncontrolling interests to redemption value	641	93
Balance as of December 31, 2022	¥ 30,552	$ 4,430

X

- Definition

Amount after tax of income (loss) from continuing operations attributable to the noncontrolling interest.

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- Definition

Change in noncontrolling interest during the period as a result of a change in the redemption value of redeemable noncontrolling interest.

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Amount of increase in noncontrolling interest from a business combination.

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As of the reporting date, the aggregate carrying amount of all noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. This item includes noncontrolling interest holder's ownership (or holders' ownership) regardless of the type of equity interest (common, preferred, other) including all potential organizational (legal) forms of the investee entity.

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