SUMMARY OF PRINCIPAL ACCOUNTING POLICIES (Advances to Suppliers and Advances for Purchase of Property, Plant and Equipment and Intangible Assets) (Narrative) (Details) - USD ($) |
Dec. 31, 2017 |
Dec. 31, 2016 |
|---|---|---|
| Advances to suppliers-current | $ 379,792 | $ 4,220,864 |
| Prepayments for property, plant and equipment, recorded in non-current assets | $ 0 | $ 416,201 |