how do i get HK visa in pakistan could you pls advise the process

If you go there for leisure or relax purpose, you should apply for a tourist entry permit.
Firstly, prepare the required documents including copy of your passport, the application form, a passport-style photo, proof of your financial support, transportation arrangement, hotel booking record, and your travel itinerary to HK.
Secondly, submit your application to the embassy of PRC to apply for it.