Hi Captaintcas,
there are plenty of possibilities and it is very important you find an airline which suits your standards, expectations and living style.
We as pilots are not all the same and some like it more relaxed, while some go for the money or the image of a carrier.
As you and some other mentioned Hainan Airlines, look up some post here in PPRUNE:
PPRuNe Forums >
PPRuNe Worldwide >
South Asia and the Far East 
Hainan interview
I also know that Air China is offering a pretty good deal with lots of commuting bases.
Definitely I would rather prefer Air China than China Southern, as the failure rate at China Southern is through the roof these day. Especially as they bait you with a B777 or B787 rating and most people fail. That's because they want you off the market for B737 jobs of their competitors.
FCOM-5