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CONDENSED FINANCIAL INFORMATION OF THE PARENT COMPANY (Details 2) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Net income | $ 8,281,017 | $ 9,073,954 | $ 7,919,408
Changes in operating assets and liabilities: |  |  |
Other receivables | 1,155,003 | 642,904 | 28,615
Other payables and accrued liabilities | (1,781,892) | 3,215,946 | 161,038
Net cash used in operating activities | 4,535,993 | 12,309,246 | (414,604)
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Purchases of property and equipment | 2,205,514 | 2,218,838 | 44,905
Net cash used in investing activities | (10,761,793) | (19,111,780) | 10,801,986
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Proceeds from issue of new shares | (2,698,046) |  |
Proceeds from secured convertible promissory note Bonds | 739,189 |  |
Underwriter's partial exercise of over-allotment option, net of issuance costs |  | 524,944 |
Proceeds from initial public offering, net of issuance costs |  | 7,417,077 |
Other payables - related party |  | (40,634) | 31,721
Proceeds from short-term loans | 3,477,422 | 5,888,837 | 3,247,632
Net cash used in investing activities | 2,488,614 | 10,596,581 | (426,221)
EFFECT OF EXCHANGE RATE ON CASH | 4,059,162 | (144,969) | (501,935)
Cash and cash equivalents, beginning of year | 15,478,587 | 11,829,509 | 2,370,283
Cash and cash equivalents, end of year | 15,800,563 | 15,478,587 | 11,829,509
Supplemental cash flow information: |  |  |
Cash and cash equivalents | 10,478,587 | 11,829,509 |
Restricted cash |  | 5,000,000 |
Parent Company |  |  |
Net income | 8,281,017 | 9,073,954 | 7,919,408
Adjustments to reconcile net income to cash used in operating activities: |  |  |
Equity income of subsidiaries and VIEs | (9,782,013) | (10,747,395) | (7,919,408)
Changes in operating assets and liabilities: |  |  |
Depreciation of property and equipment | 179,740 |  |
Other receivables |  | (600,000) |
Other payables and accrued liabilities | 925,410 | 1,570,183 |
Net cash used in operating activities | (395,846) | (703,258) |
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Purchases of property and equipment | (2,159,910) | (2,162,449) |
Investment in subsidiary | (7,660,000) |  |
Net cash used in investing activities | (9,819,910) | (2,162,449) |
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Proceeds from issue of new shares | 2,110,845 |  |
Proceeds from secured convertible promissory note Bonds | 739,189 |  |
Underwriter's partial exercise of over-allotment option, net of issuance costs |  | 524,944 |
Proceeds from initial public offering, net of issuance costs |  | 7,417,077 |
Other payables - related party | 3,039 | 269 |
Proceeds from short-term loans | 2,998,994 |  |
Net cash used in investing activities | 5,852,067 | 7,942,290 |
EFFECT OF EXCHANGE RATE ON CASH |  |  |
NET CHANGES IN CASH AND CASH EQUIVALENTS | (4,363,689) | 5,076,583 |
Cash and cash equivalents, beginning of year | 5,076,583 |  |
Cash and cash equivalents, end of year | 712,894 | 5,076,583 |
Supplemental cash flow information: |  |  |
Cash and cash equivalents | 76,583 | 76,583 |
Restricted cash |  | 5,000,000 |
Cash and cash equivalents, end of year | $ 712,894 | $ 5,076,583 |

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