I really wouldn't bother mate.
The job is seriously unrewarding, the money goes nowhere and the lifestyle these days, 777 aside, is absolutey crap. Industrial relations are approaching all time lows and continue to get worse while Hong Kong gets more expensive by the day. Best of luck getting your kids in a decent school too, as its practically impossible without seriously deep pockets.
In your 40's you should be enjoying the fruits of your labours so I wouldnt be too keen to throw in a barbie on the beach and footy on a Sunday for a Soulless Tung Chung shoebox in a city where anything vagueley interesting to do makes the cost in Perth look like eastern Europe!