There are some training centers that treat their foreign staffs well. You should be aware of this.
There are also lazy foreign teachers who are incapable of teaching well. However, many foreign teachers in China try hard to serve their students well. Bravo!
Teaching is a noble profession, even in China!
Totally correct. Training centres are for hillbillies and travelling muppets who want to earn a few quid along the way. No one should ever consider working in a training centre as a full time "career". I've done my fair share in training centres though, but only on a casual/part time basis to while away a few hours of boredom and earn some extra "hustle money". As for considering working in one full time, I'd sooner poke my eyes out with a rusty nail.
They wanna use me, fine, I use them......easy!