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SHORT-TERM INVESTMENTS (Details) - CNY (¥) ¥ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Other-than-temporary impairment loss, held-to-maturity investments	¥ 0	¥ 0
OTTI loss, available-for-sale investments	¥ 0	¥ 0
Minimum
Interest rate (as a percent)	2.19%
Maximum
Maturities	1 year
Interest rate (as a percent)	3.30%

X

- Definition

Fixed interest rate related to the interest rate derivative.

+ References

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+ Details

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X

- Definition

Period remaining until the derivative contract matures, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Amount of other-than-temporary impairment (OTTI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), recognized in earnings.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 8A
-URI http://asc.fasb.org/extlink&oid=121553693&loc=SL6284422-111562

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- Definition

Amount, before tax, of other-than-temporary impairment (OTTI) on investment in debt security measured at amortized cost (held-to-maturity), recognized in earnings and other comprehensive income (OCI).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 8A
-URI http://asc.fasb.org/extlink&oid=121553693&loc=SL6284422-111562

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