You may be able to log the hours in the specially adapted HK CAD logbook, adapted on whose request you may ask (CPA). But the rating is only P2X and of the many hours you may log none will be recognised by any other carrier and CPA / CAD will only give you credit for 300 of them.
So be very careful in your decision making. You might not be financially bonded to CPA but you would be for two good reasons.
1. It will probably take you 4-5 years to get a rating worth anything plus some hours.
2. Your "wonderful" provident fund will not be fully yours, if you leave employment, until you have completed 10 years!
Many many things are hidden and of course they will also be economical with the truth to get you to join. Knowing that once you are here it is a very big decision to move yet again, plus penalising financially.