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Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) (Unaudited) - USD ($)
 3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Income Statement [Abstract]    
Revenue $ 2,929,273 $ 3,615,684
Cost of revenue 2,272,743 2,561,984
Gross profit 656,530 1,053,700
Operating expenses:    
Selling expenses 478,691 678,330
General and administrative expenses 428,817 492,010
Research and development expenses 69,918 22,213
Bad debt expense 13,312 1,834
Total operating expenses 990,738 1,194,387
Loss from operations (334,208) (140,687)
Other income (expense):    
Interest income 3,257 2,294
Interest expense (86,780) (129,102)
Net other expense (83,523) (126,808)
Loss before income taxes (417,731) (267,495)
Income tax expense (25,985)
Net loss (417,731) (293,480)
Other comprehensive income - foreign currency translation adjustment 835,865 1,674,076
Comprehensive income (loss) $ 418,134 $ 1,380,596
Loss per share:    
Basic and diluted $ (0.01) $ (0.01)
Weighted average shares outstanding 43,579,557 43,579,557