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Taxation (Details 1) - USD ($)
6 Months Ended 12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Dec. 31, 2017
Taxation [Abstract]        
Profit before income tax expense     $ 474,512 $ 1,323,634
Thailand income tax statutory rate     20.00% 20.00%
Income tax at statutory tax rate     $ 94,902 $ 264,727
Permanent differences     25,051 (91,667)
Income tax expense (benefit) $ 27,866 $ 293,302 $ 119,953 $ 173,060