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INCOME TAX - Additional Information (Details) - HKD ($) $ in Millions | 6 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2018
Hong Kong |  |  |
Disclosure Of Income Tax Expense Credit [Line Items] |  |  |
Corporate tax rate | 16.50% |  | 8.25%
Unincorporated tax rate | 15.00% |  | 7.50%
Taxable profits | $ 2 |  |
PRC |  |  |
Disclosure Of Income Tax Expense Credit [Line Items] |  |  |
Applicable income tax rate | 25.00% | 25.00% |
PRC | Antelope Holdings (Chengdu) Co., Ltd |  |  |
Disclosure Of Income Tax Expense Credit [Line Items] |  |  |
Applicable income tax rate | 2.50% | 2.50% |
PRC | Chengdu Future Talented Management and Consulting Co, Ltd |  |  |
Disclosure Of Income Tax Expense Credit [Line Items] |  |  |
Applicable income tax rate | 2.50% | 2.50% |

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