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Borrowings from Fainancial Institutions (Details Textual) - USD ($)
6 Months Ended 12 Months Ended
Jun. 30, 2019
Dec. 31, 2018
Dec. 31, 2017
Borrowings from Fainancial Institutions [Abstract]      
Borrowings description Borrowings carry interest at the rate of MLR minus 1% per annum. Maturity date of borrowings is made and repayable on 30 November 2019, 1 February 2020, 1 August 2021 and 1 November 2021. Borrowings carry interest at the rate of MLR (6.25% as of 31 December 2018) minus 1% per annum. Maturity date of borrowings is made and repayable on 30 November 2019, 1 February 2020, 1 August 2021 and 1 November 2021.  
Interest expense $ 6,875 $ 80,607 $ 0
Unused borrowing facilities $ 285,000 $ 253,000