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SUMMARY OF PRINCIPAL ACCOUNTING POLICIES (Tables)
 12 Months Ended
Dec. 31, 2018
Accounting Policies [Abstract]  
Schedule of Property, Plant and Equipment, Depreciation, Estimated Lives
Property, plant and equipment are recorded at cost less accumulated depreciation. Depreciation is recognized on a straight-line basis over the following estimated useful lives:
 
Buildings and plants
 
30 years
Machinery and equipment
 
15 years
Furniture, fixtures and equipment
 
3-5 years
Motor vehicles
 
6 years
Schedule of Share-Based Compensation Expenses
 
 
Year ended December 31,
 
 
 
2016
 
 
2017
 
 
2018
 
Selling, general and administrative expenses
 
$
2,501,957
 
 
$
3,679,145
 
 
$
12,461,838
 
Cost of revenues
 
 
200,132
 
 
 
521,128
 
 
 
1,326,211
 
Total
 
$
2,702,089
 
 
$
4,200,273
 
 
$
13,788,049