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v3.20.1

Lease (Details Textual) |  | 12 Months Ended
--- | --- | ---
Aug. 10, 2014 USD ($) m² | Dec. 31, 2018 USD ($)
Lease (Textual) |  |
Area of a piece of land | m² | 153,832 |
Maturity date | Aug. 09, 2064 |
Payments to acquire land held-for-use | $ 7,621,715 |
Other incidental costs incurred | 452,731 |
Prepaid Land Use Rights [Member] |  |
Lease (Textual) |  |
Amortization |  | $ 169,516
RMB [Member] |  |
Lease (Textual) |  |
Payments to acquire land held-for-use | 53,100,000 |
Other incidental costs incurred | $ 3,100,000 |

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