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Accounts receivable, net | 12 Months Ended
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Dec. 31, 2021
Accounts receivable, net [Abstract] |
Accounts receivable, net | 5. Accounts receivable, net Accounts receivable consist of the following:
|  | December 31, 2021 |  |  | December 31, 2020 |
Accounts receivable from third party customers |  | $ | 3,549,190 |  |  | $ | 439,893 |
Less: Allowance for credit losses |  |  | (410,587 | ) |  |  | (18,834 | )
Accounts receivable, net |  | $ | 3,138,603 |  |  | $ | 421,059 |
For the years ended December 31, 2021 and 2020, changes in the allowance for credit losses were as follows:
|  | Year Ended December 31, |
|  | 2021 |  |  | 2020 |
Balance at beginning of year |  | $ | (18,834 | ) |  | $ | (17,045 | )
Assumed at business combination |  |  | (405,253 | ) |  |  | - |
Additions during the year |  |  | (13,375 | ) |  |  | (200 | )
Utilized provisions during the year |  |  | 8,201 |  |  |  | - |
Exchange differences |  |  | 18,674 |  |  |  | (1,589 | )
Balance at end of year |  | $ | (410,587 | ) |  | $ | (18,834 | )

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- Definition The entire disclosure for claims held for amounts due a entity, excluding financing receivables. Examples include, but are not limited to, trade accounts receivables, notes receivables, loans receivables. Includes disclosure for allowance for credit losses. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -URI http://asc.fasb.org/subtopic&trid=2196772 + Details
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