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Condensed financial information of the parent company (Details 2) - USD ($) | 12 Months Ended
--- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2022
Net (loss)/ income | $ (14,040,769) | $ (5,625,740) | $ 2,229,708
Amortization of debts issuance costs | 0 | 277,500 | 0
Issuance of ordinary shares for services | 0 | 1,100,000 | 0
Prepaid expenses and other current assets | (65,080) | (295,191) | (384,367)
Accrued expenses and other current liabilities | (1,316,707) | 2,769,703 | 27,586
Net cash used in operating activities | (2,371,172) | (30,164,971) | (7,514,619)
Other receivables | 0 | (769,875) | 20,790,311
Net cash provided by (used in) investing activities | 1,569,078 | (1,452,654) | 2,171,081
Proceeds from convertible notes | 0 | 3,000,000 | 0
Repayment of related-party loans | (2,082) | 0 | (2,000,295)
Net cash provided by financing activities | 925,831 | 13,432,547 | 24,939,210
Net increase (decrease) in cash | 121,821 | (17,851,370) | 17,856,114
Cash, beginning of year | 195,502 | 18,046,872 | 190,758
Cash, end of year | 317,323 | 195,502 | 18,046,872
Parent Company [Member] |  |  |
Net (loss)/ income | (14,040,769) | (5,625,740) | 2,229,708
Allowance for prepaid expenses and other current assets | 32,249 | 0 | 0
Interest expenses | 233,873 | 0 | 0
Amortization of debts issuance costs | 0 | 277,500 | 0
Issuance of ordinary shares for services | 0 | 1,100,000 | 0
Equity in loss (earnings) of subsidiaries | 6,033,880 | 2,423,151 | (2,448,371)
Prepaid expenses and other current assets | 0 | 0 | 92,000
Accrued expenses and other current liabilities | 104,799 | 278,521 | (202,001)
Net cash used in operating activities | (7,635,968) | (1,546,568) | (328,664)
Other receivables | (608,628) | (769,875) | 0
Purchase of treasury shares | (430) | 0 | 0
Investment in subsidiaries | (6,850,354) | (9,676,000) | (3,211,899)
Net cash provided by (used in) investing activities | 7,458,552 | (10,445,875) | (3,211,899)
Issuance of Ordinary Shares for private placement | 0 | 0 | 5,528,702
Proceeds from convertible notes | 0 | 3,000,000 | 0
Proceeds from warrants exercised | 145,290 | 8,945,433 | 0
Proceeds from related-party loans | 0 | 63,500 | 0
Repayment of related-party loans | 0 | 0 | (1,980,145)
Net cash provided by financing activities | 145,290 | 12,008,933 | 3,548,557
Net increase (decrease) in cash | (32,126) | 16,490 | 7,994
Cash, beginning of year | 32,589 | 16,099 | 8,105
Cash, end of year | $ 463 | $ 32,589 | $ 16,099

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