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Bank Loans (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Bank Loans (Details) [Line Items]        
Bank loans due amount $ 5,083,817   $ 5,083,817  
Terms of long term bank loans 30 years   30 years  
Interest rate     2.50%  
Revolving credit line $ 5,999,845   $ 5,999,845  
Interest related bank loans from continued operations 109,071 $ 149,474 701,982 $ 240,289
Interest related bank loans from discontinued operations 0 35,605 0 116,597
Bank Loans [Member]        
Bank Loans (Details) [Line Items]        
Interest related bank loans from continued operations $ 0 $ 149,474 $ 144,225 $ 240,289
Hong Kong [Member] | Minimum [Member]        
Bank Loans (Details) [Line Items]        
Interest rate     1.7468%  
Hong Kong [Member] | Maximum [Member]        
Bank Loans (Details) [Line Items]        
Interest rate     1.8726%