I think that there are a lot of different factors to consider when asking this question from what's keeping where you are currently, to what your job security in China is going to be like.
I think China is a very interesting country, and it were me, and acting were my thing, I would be willing to relocate, at least for a little while.
Take my opinion with a grain of salt though, I'm young, with few attachments, and am currently teaching Engish for a year in Korea. I have a few hubs about living in Asia if your interested, although none of them are about China.
Bottom line: Depending on your personality etc. I think you should go for it. I would be willing to under the right circumstances.