Hi!
I'm US citizen. I'm doing from San Francisco to Bankok throw Taipey. Shall I have any of China visas?
Thanks.

fyi, most people spell it "taipei" (though it's "taibei" if you use pinyin, which taiwanese dislike).

and, while i'm sure most mainlanders would be happy that you referred to [taiwan] as china, taiwanese might take offense.

in any case, you don't need a visa of any kind to visit taiwan for (21 days?) so transit is no problem.

had your post been about transiting in the prc, my answer would be a little more complex because tmk shanghai, haikou, and sanya are the only three places you can pull it off (and the odds of any fters transiting in the latter 2 cities are pretty damn low for the foreseeable future).

btw, i hope the above doesn't seem snide. i was merely attempting to help clear up some of the confusion that was imbedded in your post in addition to answering your question. happy travels!

I don't think English is his first language