You may want to ask your company to split your salary between cash payment and rental reimbursement, the whole company would have to go under that scheme.
That is basically a loophole that saves you quite a bit of tax, see below:
https://assets.kpmg.com/content/dam/...mbursement.pdf
Its different from the max HKD100k per annum tax deduction for domestic rent (which works out to HKD8,333 per month!)