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Disposition of a subsidiary - Reconciliation amounts of discontinued operations in statements of operations and other comprehensive income (loss) (Details) - Forest Food - USD ($) | 12 Months Ended
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Sep. 30, 2021 | Sep. 30, 2020
Reconciliation of the amounts of major classes of operations classified as discontinued operations |  |
Revenue | $ 2,022,846 | $ 1,803,816
Cost of revenues | (1,783,156) | (1,490,702)
Gross profit | 239,690 | 313,114
Operating expenses | (221,586) | (479,182)
Income from operations | 18,104 | (166,068)
Other expenses | (69,875) | (79,201)
Income before income taxes | (51,771) | (245,269)
Provision for income taxes | 419 | (18,578)
Net loss from discontinued operations, net of tax | $ (51,352) | $ (263,847)

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