If you're not good enough at teaching, how about trying to improve yourself for the sake of your students? How about making self-improvement (in teaching) your goal, instead of focusing on getting a "good" release letter.

I have been trying to improve my teaching to satisfy my students more, but the other foreign teacher told me in confidance the Chinese teachers in the English department office had said I was not a good teacher and not likely to develop into one. He can speak Chinese, so he was able to moniter what they were chatting about. He didn't tell them his Chinese was good, as he wanted to understand their unhibited talk! He has a degree, so he's on much more than me, but that's fair. I'm on 3500 quia a month, which gives me a comfortable life. He has no need to make trouble for me, as I can never be a threat to him visa vie employment. I think his teaching rating was just average because he often complains about things like late pay. I never complain about anything as I feel vulnerable because of my poor teaching. I would have been happy with an average release letter, but I was worried I would get a poor rating. So, I tried to engratiate myself and flatter my Chinese superiors. Where I came from, I'd been a movie theater usher ever since flunking uni as a freshman. I don't want to go back to that kind of bad job. I had not shown that on my resume before coming here. I know Chinese teachers like to look down on others. My agent told me that and how to do my resume.