I have seen this scenario time and time again. You are not qualified to teach the English Language unless you are fluent. After reading your posting it is obvious that you are not. You seem to feel that because your English is better than some of the Chinese English teachers that somehow makes it okay. Get a handle on it, Dude! Your English is substandard. You shouldn't be teaching English at any level.

I'll second that. But what about Linyi Normal University breaching his contract on several occasions? Do you think that's a professional way for an employer who has hired an incompetent foreign teacher to behave? Is this the way Chinese employers who are dissatisfied with their foreign teachers sicken them? Why not just fire them for incompetence? There's a pile of evidence condemning Linyi Normal University as an unscrupulous employer, irrespective of the Polish foreign teacher of English being disgruntled or not. Is it worth teaching there as a competent foreign teacher and being expected to put up with contractual violations? Don't teach there, thats my advice!