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Prepaid Expenses and Other Current Assets, Net | 12 Months Ended
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Sep. 30, 2021
Other Income and Expenses [Abstract] |
PREPAID EXPENSES AND OTHER CURRENT ASSETS, NET | 7. PREPAID EXPENSES AND OTHER CURRENT ASSETS, NET As of September 30, 2020 and 2021, prepaid expenses and other current assets consisted of the following:
|  | As of September 30, |
|  | 2020 |  |  | 2021 |
Prepaid construction fee(1) |  | $ | - |  |  | $ | 384,425 |
Prepaid exhibition fee |  |  | - |  |  |  | 80,796 |
Prepaid rental fee |  |  | 53,784 |  |  |  | 74,288 |
Prepaid IPO related expense |  |  | 759,365 |  |  |  | - |
Receivable from disposal of a production line |  |  | 14,394 |  |  |  | - |
Others |  |  | 67,924 |  |  |  | 70,093 |
Less: allowance for doubtful accounts |  |  | (14,394 | ) |  |  | - |
Prepaid expenses and other current assets |  | $ | 881,073 |  |  | $ | 609,602 |
(1) | The balance represented prepaid construction fee for plant maintenance and renovation.

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- Definition The entire disclosure for other income or other expense items (both operating and nonoperating). Sources of nonoperating income or nonoperating expense that may be disclosed, include amounts earned from dividends, interest on securities, profits (losses) on securities, net and miscellaneous other income or income deductions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -URI http://asc.fasb.org/topic&trid=2122503 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 610 -URI http://asc.fasb.org/topic&trid=49130413 + Details
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