Your wife has to apply for a Spouse Settlement visa. The visa fee is £1195 + a NHS surcharge of £500. This will grant an initial limited leave to remain visa of 2.5 years.
As the sponsor you have to submit evidence showing that you earn at least £18,600 per annum. You should submit the most recent 6 months of pay slips and 6 months corresponding bank statements. If you have no income at all, you will need £62,500 in savings held in an accessible account for a minimum of 6 months. Only savings over £16,000 will be considered to meet any shortfall in earnings.
You'll need to submit proof of a genuine relationship + adequate accommodation available in the UK on your wife's arrival.
It would help if you could post details of your situation.
1.Are you employed in the UK or living in Hong Kong?
2.Does your wife have a degree taught in English?
(If not she will have to pass a A1 level English test from a UKVI approved test provider).
3. Does your wife have residence in Hong Kong, or is she there as a visitor?
https://www.gov.uk/join-family-in-uk/overview