Do it only if you ( and your family) are prepared to live in hong kong at some point. Don't assume you can have a career in cx exclusively on a base, it won't work out most probably.
Then, if you think you could live here, check it out for yourself before you sign up. Bring your family with you and look at the living conditions carefully. Things to consider : pollution, schools, social life of your family when you are away, volatile real estate market,general willingness to live in a foreign society, differences regarding possible time-out activities etc.
I wont go into the training/checking problem we have here at cx, I am sure you are already aware of that, but consider things like : lack of union (power), constant changing basing policies, cultural problems within the pilots group especially towards americans, very long time to upgrade with 65 age in force. On the upside : future of the company looks secure, no layoffs occured during sars crisis compared to american hire/fire culture at 9/11.
good luck