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Other receivables, prepayments and other current assets (Details) - USD ($)
Dec. 31, 2019
Dec. 31, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]    
Deposit $ 5,714 $ 3,482
Prepaid event costs 28,292 2,784,295
Prepaid investment 825,834
Prepaid software development fees 430,836 436,142
Prepaid product costs 97,010
Prepaid expenses 63,257 71,112
Total $ 625,109 $ 4,120,865