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4. PROPERTY, PLANT AND EQUIPMENT, NET (Details Narrative) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2019
Property, Plant and Equipment [Abstract] |  |  |  |  |
Land | $ 19,056,942 |  | $ 19,056,942 |  | $ 19,894,947
Depreciation and amortization expense | 4,347,139 | $ 3,632,805 | 11,903,728 | $ 10,530,985 |
Direct labor and factory overheads incurred during plant shutdown | 1,025,344 | 2,449,352 | 4,771,228 | 7,535,376 |
Cost of administrative expenses | 203,149 | 201,182 | 602,968 | 648,456 |
Cost of net revenue | $ 3,118,646 | $ 982,271 | $ 6,259,532 | $ 2,347,153 |

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