For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-Publisher FASB
-Name Accounting Standards Codification
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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

CERTAIN RISKS AND CONCENTRATION (Details)	12 Months Ended
CERTAIN RISKS AND CONCENTRATION (Details)	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Sales Revenue, Goods, Net [Member]
Concentration Risk [Line Items]
Concentration risk percentage	5.30%	10.90%	7.20%
Sales Revenue, Goods, Net [Member] \| Foreign Currency Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration risk percentage	81.90%
Accounts Receivable [Member]
Concentration Risk [Line Items]
Concentration risk percentage	10.00%	10.00%