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Bank Loans (Details Narrative) - USD ($)
6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Short-term bank loans $ 7,280,369   $ 7,817,610
Weighted average interest rate, percentage 6.51% 5.97%  
Interest expenses $ 200,000 $ 200,000  
Minimum [Member]      
Borrowings, interest rate 5.66%    
Maximum [Member]      
Borrowings, interest rate 6.74%