How big is the culture shock coming to China?
Most commonly, teachers are so excited to be in China that by the time this feeling recedes, they are already somewhat acclimated. Regardless though, people often start missing home at about the 3 month mark. Come with an open mind and as few predispositions as possible about what things are like over here, and you will almost certainly be fine. Keep in mind that one benefit provided by ACES is membership in a community of Chinese and foreigners that will actively try to help minimize cross-cultural stress wherever possible. Issues that sometimes provide frustration for teachers include differing standards of etiquette, availability of certain foods, service at stores and restaurants, and, of course, the language barrier.
