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Other Receivables - Schedule of Other Receivables (Details) - USD ($)
Jun. 30, 2020
Dec. 31, 2019
Dec. 31, 2018
Receivables [Abstract]      
Interest receivable   $ 570,862 $ 3,381,550
Others   75,828 71,018
Total $ 796,948 $ 646,690 $ 3,452,568