There are a handful of Chinese members I've come across, as well as a number of foreign folks who speak Chinese. Proportionally, not that many though.

China does have a large Total War community and a fair few of their mods have made it over here, but yes, they have their own Chinese-language sites and boards. I wouldn't say I'm active on any of them, but I pop over from time to time (mainly to see what developments they've been making in their AAR scene). Very friendly folks from what I can tell.