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CONCENTRATION OF RISKS (Narrative) (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Apr. 16, 2012
Concentration Risk [Line Items]
Concentration risk percentage	10.00%
Foreign currency exchange rate risk
Appreciation and depreciation of the RMB against US dollar (as a percent)	5.70%	6.30%	7.20%
Minimum [Member]
Foreign currency exchange rate risk
Daily floating range of RMB trading prices against the U.S. dollar (as a percent)				0.50%
Maximum [Member]
Foreign currency exchange rate risk
Daily floating range of RMB trading prices against the U.S. dollar (as a percent)				1.00%
Customer Concentration Risk [Member] | Sales Revenue, Goods, Net [Member]
Concentration Risk [Line Items]
Concentration risk percentage	35.00%	32.70%	27.70%
Supplier Concentration Risk [Member] | Cost of Goods, Total [Member]
Concentration Risk [Line Items]
Concentration risk percentage	90.00%	95.00%	72.00%

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- Definition

Represents percentage of daily floating range of RMB trading prices against the U.S. dollar.

+ References

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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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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.

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