We are indians working in UAE , like to travel to hkg to meet our brother, do we require visa?

Me and wife like to travel on 12th June 2013 Night to HKG and return on 17th June 2013 back to Dubai . my brother and family are working in HKG . Should we have to take the application and what is the procedure if so and how long it will take. Also advise where is Chinese Embassy in dubai to apply for both HKG AND MACOU .