Oops, hit "Save" too soon.
I've got a lot of the major roads in there, using Yahoo Aerial Imagery, and then also used a few out of copyright CIA maps with the help of Magnacarta's map rectifier.

http://labs.metacarta.com/rectifier/map/145 http://labs.metacarta.com/rectifier/map/146

The original map images are here:
http://www.lib.utexas.edu/maps/china.html

Have A Nice Day!