travel to another country from hongkong

hi,im a filipino.my friends and i are going for a 14-days vacation in macau and hongkong. im planning to take a flight to brazil on the 3rd day for a 3-day vacation just for sightseeing including the beautiful churches there. ill have my brazil roundtrip ticket(hongkong-brazil),hostel booking and itinerary and of course pocket money.ill be back to hongkong after my 3days vacation in brazil. im taking this chance coz it seldom comes that i have this opportunity to have this holiday.will the hongkong immigration allow me?