I should add, its not as though HK is a hardship basing....afterall, to name a few, there is WanChai and Lan Kwai Fong, Soho, Hollywood road, loads and loads of places to eat, drink and talk rubbish to the ladies on your numerous days off! Hint: tell em your a dolphin trainer!
As I said, good luck in your interviews, study up HK and CX, you will definately be asked about your knowledge of both. And as Flyhardmo said, it will be more than 3 years to upgrade....