I appreciate the attempt at humour and the attempt to be helpful to would-be expats, but you're painting the landscape with a very wide brush.
At the green & white airline in the big city down the coast things are considerably better than what you describe. There are many good Chinese pilots- good not only as in competent- but in personality. Treat them with respect and fairness and you get it back. While it's true that many things are backwards and frustrating by western standards- the Chinese are growing their industry a heck of a lot faster than we grew ours and we need to cut them some slack.
Maybe the individuals in your story deserve the treatment you've provided but without knowing you and projecting the other side of the story- I have no way of being sure. But I think you're really being unfair in your portrayal of Chinese airlines and the culture and country as a whole. There are a lot of good, high-quality people here.
Providing a required skill or not- we're guests in this country and I wouldn't blame Chinese completely unconnected to Tianjin for being greatly offended by you and your book. I sure hope they don't tar all of us with one brush like you did with them.