This is an awesome little site: CLICK ME!  You can look up the cost of living in just about all countries.  You can look at it various currencies, also.  This gives you the view that you're used to (mainly EUR and USD)..

Good luck in China!

Hey there!

That's great you're thinking of heading off to China. Why not get in touch with these people who are out in China at the minute:

http://www.onlinetefl.com/tefl-chalkboard/zoeholl111

http://www.onlinetefl.com/tefl-chalkboard/rozel09

http://www.onlinetefl.com/tefl-chalkboard/robertclarke

Or check out the following pages for more information:

http://www.onlinetefl.com/teaching-internships/china/

http://www.onlinetefl.com/tefl-jobs-abroad/tefl-china.html

Good Luck!