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PRINCIPAL ACTIVITIES AND ORGANIZATION - OPERATIONS AND FINANCIAL POSITIONS (Parenthetical) (Details) - CNY (¥) ¥ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Accounting Policies [Abstract]
Variable interest entity, consolidated, liabilities, no recourse	¥ 326,899	¥ 635,467

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- References

No definition available.

+ Details

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- Definition

Variable interest entity no recourse liabilities.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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Period Type:	instant