how can i apply as a tourist For Hong Kong from dubai

Hi Sir & Madam. My name is Mohan Khanal.since last ten years im staying in U.A.E. My future wife and her family all of them are in Hong Kong so i have planing to go for my weeding this comeing january from 20th to fab 5th just for 15 days. i have alreday NOC latter from company so what i need more documents to apply my visa as tourist for HK.do i need any invitation latter from my fiyancy.plz i need your help.
thank you so much with regards.