Key Points:
Hong Kong is not one of the best travel destinations, but is an important part of travelling around the world.
Nomadic Matt has provided an itinerary that could be worth reading.
According to Wikipedia, "Hong Kong, officially the Hong Kong Special Administrative Region of the People's Republic of China (abbr. Hong Kong SAR or HKSAR), is a city and special administrative region of China on the eastern Pearl River Delta in South China. Hong Kong is one of the most densely populated places in the world. Hong Kong is also a major global financial centre and one of the most developed cities in the world."
Here we quote the best way to travel in Hong Kong provided by Nomadic Matt, a New York Times best-selling author of How to Travel the World on $50 a Day and Ten Years a Nomad, as well as the founder of his website.
There are also some itineraries from wikiVoyage that you can try as well:
Hong Kong Culinary Tour – Travel guide at Wikivoyage (need additional 1 day)