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16. CUSTOMER CONCENTRATION
12 Months Ended
Dec. 31, 2019
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, 2019, the Company sold 78.6% of its products to its top five customers, respectively. As of December 31, 2019, amounts due from these customers were $4,877,106.

During the year ended December 31, 2018, the Company sold 90% of its products to its top five customers, respectively. At December 31, 2018, amount due from these customers were $0.