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RECONCILIATION BETWEEN U.S. GAAP AND INTERNATIONAL FINANCIAL REPORTING STANDARDS - Reconciliation of net income in the consolidated statements of comprehensive income (Details) - HKD ($) $ in Thousands | 6 Months Ended | 9 Months Ended
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Jun. 30, 2022 | Jun. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Reconciliation of net income attributable to the Company in the consolidated statements of comprehensive income |  |  |  |
Net income | $ 1,213,525 | $ 1,696,190 | $ 1,968,168 | $ 2,311,401
Operating lease expense | 57,682 | 47,543 | 87,503 | 77,400
Share-based compensation | $ 97,251 | $ 33,416 | $ 148,705 | $ 64,295

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