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Organization and Principal Activities - Schedule of VIEs' Assets and Liabilities (Details) - USD ($)
Jun. 30, 2020
Dec. 31, 2019
Dec. 31, 2018
Current assets $ 9,460,109 $ 5,561,034 $ 64,784,005
Plant and equipment, net 797 1,503 250,886
Total assets 9,464,905 5,569,057 66,845,092
Total liabilities $ (3,059,919) (3,048,953) (1,963,972)
Net assets   11,353,962 11,316,561
Variable Interest Entity [Member]      
Current assets   45,180,787 51,754,573
Plant and equipment, net   1,503 210,790
Other noncurrent assets   6,520 1,560,202
Total assets   45,188,810 53,525,565
Total liabilities   (45,964,142) (2,111,670)
Net assets   $ (775,332) $ 51,413,895