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Borrowings (Details) - USD ($)
 12 Months Ended
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