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VARIABLE INTEREST ENTITY (“VIE”) (Details 1) - USD ($) | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Gross profit | $ 16,302,329 | $ 12,422,502 | $ 8,844,807
Net income | 9,073,954 | 7,919,408 | 5,124,973
Variable Interest Entity [Member] |  |  |
Revenues | 23,834,129 | 18,531,178 | 14,144,894
Gross profit | 16,302,329 | 12,422,502 | 8,844,807
Income from operations | 11,153,956 | 8,317,465 | 5,944,458
Net income | $ 10,747,395 | $ 7,919,408 | $ 5,124,973

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