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Income Taxes (Details) - HKD ($) $ in Millions | 12 Months Ended
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Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2020
Income Tax and Tax Rate [Line Items] |  |  |
Income tax rate | 25.00% | 25.00% | 25.00%
HK |  |  |
Income Tax and Tax Rate [Line Items] |  |  |
Income tax rate | 16.50% |  |
Preferential income tax rate | 8.25% |  |
Assessable profits threshold for preferential income tax rate | $ 2.0 |  |
PRC |  |  |
Income Tax and Tax Rate [Line Items] |  |  |
Income tax rate | 25.00% | 25.00% | 25.00%
Preferential income tax rate | 15.00% |  |

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