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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) -Schedule of accumulated other comprehensive income (loss) (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023 CNY (¥)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 CNY (¥)	Dec. 31, 2021 CNY (¥)
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)
Beginning Balance	¥ 453,074		¥ (207,882)	¥ (68,440)
Foreign currency translation adjustments, net of tax of nil	102,268		660,956	(139,442)
Ending Balance	¥ 555,342	$ 78,218	¥ 453,074	¥ (207,882)

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- Definition

Other comprehensive income foreign currency transaction and translation adjustment net of tax.

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Amount, after tax, of accumulated increase (decrease) in equity from transaction and other event and circumstance from nonowner source.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
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-Topic 944
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-Publisher FASB
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