Jesus Christ, 67k is peanuts. You will not be able to live on that in Hong Kong.
Period.
I earn nearly 3 times that as an F/O in HKG, and that just about provides a manageable life for living in this godforsaken cesspit.
Even a single guy/girl would struggle, but with a missus or even worse kids, you're kidding yourself.
I guess it's monkey pay for a monkey operation. I've said it before, be VERY careful about going to work for these clowns. Reason - you very well might struggle to get a job anywhere else with that on your cv...
A good contrast is Ryanair, horrendous reputation from a passenger's point of view, but the training is excellent. Therefore Ryanair is a valid stepping stone, and the likes of Emirates and co. snap up the Ryanair pilots like there's no tomorrow.
Hong Kong Airlines = the opposite.