Yeah that's a touchy issue right here, and I will strongly advise you to see a tax professional. One that specializes in the foreign income tax exclusion.
I moved to HKG last year and in order to qualify I have to use the physical presense test since I arrived after Jan 1st. From what I've heard you can only use the bona fide residence test from Jan 1 to Jan 1.
It's also going to help you to have an address set up, be paying bills there, have a phone number, and definitely a visa and identity card.
Don't trust my word for it, pay the money and go to a pro.