i am kamran from pakistan now in UAE i need hong kong tourist visa what requirements

Raja, you should first prepare the required documents: copy of your passport, the application form, a recently-taken passport-sized color photo, proof of your financial support, hotel reservation, flight itinerary and your travel plan to HK.
And then submit the application to the embassy of PRC to apply for it, or post it to HK immigration department to apply, below is the postal address:
Receipt and Despatch Sub-unit
HK Immigration Department
2/F, Immigration Tower
7 Gloucester Road
Wan Chai, HK