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Acquisition of a subsidiary and Hitrans Loan (Tables) | 9 Months Ended
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Sep. 30, 2021
Business Combinations [Abstract] |
Schedule of acquisition of a subsidiary |
|  | December 31, |  |  | September 30, |
|  | 2020 |  |  | 2021 |
Deposits paid for acquisition of a subsidiary |  | $ | - |  |  | $ | 8,349,118 |
Schedule of hitrans Loan |
|  | December 31, |  |  | September 30, |
|  | 2020 |  |  | 2021 |
Hitrans Loan |  | $ | - |  |  | $ | 20,326,775 |

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