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Borrowings (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disclosure of detailed information about borrowings [text block] [Abstract] |  |  |
Borrowings description | For the year ended December 31, 2021, the Company borrowed four bank loans carrying interests at the rates of 4.47, 2%, 2%, and 4.22%, respectively. | the Company borrowed five bank loans carrying interests at the rates of MLR minus 1%, MLR minus 1%, MLR minus 1%, 2%, and 2%, respectively. Borrowings are due to mature and repayable on June 30, 2023, May 31, 2022, April 7, 2025 and February 16, 2022. |
Interest expense | $ 78,353 | $ 82,779 | $ 81,191
Unused bank overdraft | $ 300,000 | 330,000 |
Unused trust receipts |  | $ 1,700,000 |

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