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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Non-controlling interests (Details) | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Sep. 30, 2023 USD ($) | Sep. 30, 2023 CNY (¥) | Mar. 31, 2025 USD ($) | Sep. 30, 2024 USD ($) | Sep. 30, 2021 | Sep. 30, 2020
Noncontrolling Interest |  |  |  |  |  |
Noncontrolling interests |  |  | $ 1,368,195 | $ 1,349,505 |  |
Payments to acquire businesses and interest in affiliates | $ 28,356 | ¥ 200,000 |  |  |  |
Percentage of additional equity interest acquired | 0.20% | 0.20% |  |  |  |
Chengdu QLS and subsidiaries |  |  |  |  |  |
Noncontrolling Interest |  |  |  |  |  |
Acquired equity interest, subsidiaries, percentage |  |  |  |  | 7.76% |
Chengdu QLS and subsidiaries |  |  |  |  |  |
Noncontrolling Interest |  |  |  |  |  |
Ownership interest acquired (in percent) |  |  |  |  | 79.51% | 71.75%
Gansu QLS |  |  |  |  |  |
Noncontrolling Interest |  |  |  |  |  |
Ownership interest acquired (in percent) |  |  | 79.71% | 79.71% |  |
Gansu QLS |  |  |  |  |  |
Noncontrolling Interest |  |  |  |  |  |
Ownership interest (in percent) |  |  | 0.786% |  |  |
Noncontrolling interests |  |  | $ 1,161,373 | $ 1,146,121 |  |
Chengdu QLS and subsidiaries |  |  |  |  |  |
Noncontrolling Interest |  |  |  |  |  |
Ownership interest (in percent) |  |  | 20.29% |  |  |
Noncontrolling interests |  |  | $ 184,899 | 181,315 |  |
Zhongqiao Youguan E Commerce Service Co. Ltd |  |  |  |  |  |
Noncontrolling Interest |  |  |  |  |  |
Ownership interest (in percent) |  |  | 49.00% |  |  |
Noncontrolling interests |  |  | $ 21,923 | $ 22,069 |  |

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