neither your res card nor your visa are "transferable" between positions, although if you did leave and take up other employment, your new employers might very well not inform you of this important fact for reasons of economy. If however someone in authority were ever to notice that your place of work was not the same as the one associated with your res card and visa, you could be deemed an illegal alien and this carries with it the possibilty of substantial fines, deportation and being barred from entering china for - i think - 5 years.

you have to look out for your own interests. no matter what other people say about yet other people, it is up to you to forge your own relationships. i am sure the situation is not beyond repair. maybe you should look at doing a bit of bridge rebuilding and fence mending. sweet smiles and fruit go a long way towards letting people know that a problem is not a problem anymore. you have to realise that some people might have been just as if not more offended by your behaviour as you have been by theirs,and seeing as they are in the majority here, the onus is really upon you to make some compromises with regard to the way you react in various situations.

if you don't want to do something that you are not contracted to do, a no and an excuse is enough to get out of it. people (any people) will only try to talk you into things if they sense a little bit of weakness on your part so be assertive, polite and friendly, and you'll find that things should work out ok.

lastly, it's not a good idea to get too specific on the internet. it's not only foreign company-deprived teachers who read these boards. take the delete option in your post, then a couple of deep breaths and get out there and do what you have to do. you'll be laughing about it all in the near future, and maybe you should look for a bit of humour in it now for there surely is some there...

...and nothing cures inexperience like getting thrown in at the deep end does chickybabe.