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Bank Loans (Details) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Bank Loans (Details) [Line Items]    
Bank loans due amount $ 5,064,142  
Terms of long term bank loans 30 years  
Interest rate 2.50%  
Revolving credit line $ 6,322,417  
Interest related bank loans from continued operations 965,163 $ 322,201
Interest related bank loans from discontinued operations 0 147,631
Bank Loans [Member]    
Bank Loans (Details) [Line Items]    
Interest related bank loans from continued operations $ 263,369 $ 322,201
Hong Kong [Member] | Minimum [Member]    
Bank Loans (Details) [Line Items]    
Charged interest percentage rate 1.63%