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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Non-controlling interests (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020
Noncontrolling Interest [Line Items] |  |
Acquisition of Noncontrolling interest | $ 706,659 |
Noncontrolling interests | $ 1,809,852 | $ 2,743,273
Chengdu QLS and subsidiaries |  |
Noncontrolling Interest [Line Items] |  |
Acquired equity interest, subsidiaries, percentage | 7.76% |
Chengdu QLS and subsidiaries |  |
Noncontrolling Interest [Line Items] |  |
Equity interest, percentage | 79.51% | 71.75%
Gansu QLS |  |
Noncontrolling Interest [Line Items] |  |
Ownership interest (in percent) | 0.786% | 1.703%
Noncontrolling interests | $ 240,683 | $ 387,420
Chengdu QLS and subsidiaries |  |
Noncontrolling Interest [Line Items] |  |
Ownership interest (in percent) | 20.49% | 28.25%
Noncontrolling interests | $ 1,569,169 | $ 2,355,853

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