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ACCOUNTS RECEIVABLE, NET (Tables) | 12 Months Ended
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Dec. 31, 2021
ACCOUNTS RECEIVABLE, NET [Abstract] |
Accounts Receivable | Accounts receivable, net is summarized as follows:
|  | December 31, 2021 |  |  | December 31, 2020 |
Accounts receivable |  | $ | 3,523,543 |  |  | $ | 1,584,448 |
Less: provision for doubtful accounts |  |  | (1,475,983 | ) |  |  | (1,121,115 | )
Accounts receivable, net |  | $ | 2,047,560 |  |  | $ | 463,333 |
The changes in the provision for doubtful accounts are as follows:
|  | For the Years Ended December 31, |
|  | 2021 |  |  | 2020 |  |  | 2019 |
Balance at the beginning of the year |  | $ | 1,121,115 |  |  | $ | 874,355 |  |  | $ | - |
Additions |  |  | 391,189 |  |  |  | 92,009 |  |  |  | 946,590 |
Write-off |  |  | (86,170 | ) |  |  | - |  |  |  | (51,418 | )
Foreign exchange |  |  | 49,849 |  |  |  | 154,751 |  |  |  | (20,817 | )
Balance at the end of the year |  | $ | 1,475,983 |  |  | $ | 1,121,115 |  |  | $ | 874,355 |

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- Definition Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3,4) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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