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OTHER RECEIVABLES, NET (Details) - USD ($) | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Notes to Financial Statements |  |  |
Deposit for business acquisitions | $ 12,324,583 |  |
Deposit for set-up of research center | 86,007 |  |
Others | 814,615 | 261,889 |
Allowance for doubtful accounts | (42,676) | (29,571) | $ (13,830)
Total other receivables, net | $ 13,182,529 | $ 232,318 |

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