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PARENT COMPANY ONLY CONDENSED FINANCIAL INFORMATION (Condensed statements of comprehensive loss) (Parenthetical) (Details) - CNY (¥) ¥ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Condensed Financial Statements, Captions [Line Items]
Foreign currency translation, net of tax	¥ 0	¥ 0	¥ 0
Parent Company
Condensed Financial Statements, Captions [Line Items]
Foreign currency translation, net of tax		¥ 0	¥ 0	¥ 0

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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Amount after tax, before reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

+ References

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-Publisher FASB
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