Hi drwagih,
I work for Hult, and just to clarify about the Shanghai campus, it is only offered as a choice as part of your elective rotation C (ie those are the only courses offered in Shanghai). You cannot study with Hult the entire year there. Please see this FAQ for more detail:
http://www.hult.edu/mba-program/admissions/faq#16I lived in Hong Kong for several years recently and although it's certainly very international, compared to mainland China it's extremely hard to integrate the Chinese community. Hong Kong people have such a long exposure to English-speakers and foreigners in general that they have completely divided their lives between the English-speaking business world and Cantonese-speaking private lives. Practically no foreigners in HK learn to speak Cantonese: they don't need it and frankly HK people are generally pretty closed to the idea. I spent 3 years trying to learn and practice Cantonese both at a language school and with colleagues and had a really hard time finding anyone willing to practice with me. Everyone just says, "You should learn Mandarin instead".
So I'd say that if you're looking for a really Chinese experience and the chance to learn some Chinese, Shanghai or anywhere else in the mainland is a much better choice than HK. HK has lots of good sides, but you won't be immersed in Chinese culture at all.