n fact, with the globalization, you do not have to pay specilized attention to Chinese companies since Chinese know american a lot. Xd.
However, when you have to deal with the issues with companies from small cities(i mean, compared with big cities like Shanghai), you really have to pay a lot of attention since the head of them may not understand your values or even cannot speak english.
I'd like to give you an example. Some old Chinese like to say"The business should be done while drinking", that is a truth in a lot of places in China. And remember, not drinking WINE but CHINESE SPIRITS, and commonly the more expensive the spirits you bring are, the better the assessment you get from them is.
Also, if you want to establish or expand your business in China, you'd better have some direct or indirect relationships with local government. Trust me, you can benefit a lot from it.