In Sheung Wan on Queen's Road West near the Queen's Terrace are two most famous Chew Chou restaurants in Hong Kong, so they say. They do have Hainan style chicken but with the extra greasiness and strong flavor of Chew Chou dishes. Worth a try- but I can't take it everyday, food there is too oily and greasy and there're about 50000 calories in one dish ;p