Commuting from SHZ?!?! nuts.....
OK, if even with all you read before you are still willing to go, take in consideration that your plan to commute from SHZ is impossible with the fantastic rooster of HKE. Early start and late arrival, days off that are never together (except for 2 days off that are the minimum legal), and you won't be able to commute. You'll have to live in HK. And pay HK taxes as well. So hte savings you are saying are impossible.
Even if you live your family in China (how do you plan to keep your visa?) you'll need to rent a place in HK due to rooster. And don't expect to fly too much in terms of flying time, but you can expect lots of nights away (for instance, fly 1:30 HKG-MNL, stay 3 days in MNL, and then fly 1:30 back; so in five days you'll have flown 3 hours and stayed 4 nights away from home).
Good luck, But even if the situation gets better you'll still working for the same bastards, and they don't respect any contracts or nothing. And forget about going to court, you'll loose, as everybody did!
If you speak to any of the guys who left you'll see that everybody (including myself) are very happy about the fact of being far away from HKE or from anything related to Hainan gruop, since the Singas answer to them and they agree with the way things are going there.