Though many nationalities are visa-free to visit Hong Kong and Macau, but you need to check before your tour to Hong Kong.
Travellers wishing to visit Hong Kong and Macau should check at the Chinese Embassy website in their home counties to see if they also need a visa to visit these Special Administrative Regions (SAR).
Please note that visas for China and Hong Kong are the responsibility of the individual traveler. The visa requirements for your trip vary depending on where you are from and where you are going. For the most up to date information please check your governments foreign ministry website or with you travel agent as rules do change. It is important that you check for yourself. For most travelers there will probably have an embassy and consulate in the country that you live in.
Please note that China and Hong Kong are two separate government areas so you go through two sets of immigration procedures. If your trip finishes in Hong Kong and you are travelling back into Mainland China then you may need a double entry visa. Please check your travel itinerary.
