Guys,
A friend of mine told me that CX will accept any ATPL from any country. However, Hong Kong Civil Aviation Department (CAD) has her own set of rules to qualify for HK ATPL. (All CX jets are HK registered except Lear 45 in Adelaide) e.g, if you are the CAA (UK) ATPL holder, you may be given some exemptions and have to sit for 3 papers to qualify for the HK ATPL and up to 10 papers if you are the FAA licence holder.
I was informed that the HK ATPL syllabus is quite similar to the CAA (UK). So better have a look what it is like.
Good Luck