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v3.20.1

Prepayments and Other Current Assets (Tables) | 3 Months Ended
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Mar. 31, 2020
Prepayments and Other Current Assets [Abstract] |
Schedule of prepayments and other current assets [Table Text Block] |
|  | March 31, |  |  | December 31, |
|  | 2020 |  |  | 2019 |
Prepaid land lease |  | $ | 169,370 |  |  | $ | 301,023 |
Prepayment for purchase of materials |  |  | 218,785 |  |  |  | 5,394,297 |
Value-added tax recoverable |  |  | 5,579,872 |  |  |  | 5,666,975 |
Others |  |  | 86,069 |  |  |  | 250,946 |
|  | $ | 6,054,096 |  |  | $ | 11,613,241 |

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