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16. CUSTOMER CONCENTRATION
12 Months Ended
Dec. 31, 2017
Risks and Uncertainties [Abstract]  
16. CUSTOMER CONCENTRATION

The Company sells a substantial portion of its products to a limited number of customers. During the year ended December 31, 2017, the Company sold 36.7% of its products to its top five customers. At December 31, 2017, amount due from these customers were $22,804,914. The Company sells a substantial portion of its products to a limited number of customers. During the year ended December 31, 2016, the Company sold 30.9% of its products to its top five customers. At December 31, 2016, amount due from these customers were $25,111,129.