Hey David,
My name is Steve and i just returned from China last week. I also race onroad nitro too and live in the bay area. Where in China do you live?
So check it out. You have three choices: Rams rc club, Norcal Hobbies, and Speedworld. I think the best and closest to you is Norcal hobbies. Find them online and check out rcracing.com (local bay area rc forum) We are actually racing this sunday. When do you come to the states?

talk to you soon
steve