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Organization and Principal Activities - Schedule of VIEs' Reported Consolidated Statements of Operations and Comprehensive Income (Details) - USD ($)
 6 Months Ended 12 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Cost of revenues $ 126 $ 123 $ 654,979 $ 729,752
Total operating expenses 872,549 1,202,986 1,993,959 15,753,432 3,782,029
Net loss / (income) $ (640,243) $ (55,881,292) (61,995,758) (3,818,737) 24,048,184
Variable Interest Entity [Member]          
Revenues     1,366,417 14,402,329 25,116,139
Cost of revenues     123 654,979 729,752
Total operating expenses     784,840 12,329,417 3,477,939
Net loss / (income)     $ 53,859,306 $ 1,530,958 $ 24,268,121