Thank you for your question. The Government rates paid to the Hong Kong Government would be allowable against the rental profits.
Please clarify why you were required to pay property tax. Regarding the cost of the lease, please please refer to:
Deductions: main types of expense: legal and professional costs
You may also wish to refer to:
Tax relief for residential landlords: how it's worked out
Deductions: interest: restriction for income tax purposes from 2017/18: introduction