^^there are several Chinese dialects or languages, like Hakka, Fookien, Cantonese, etc. But I'm guessing that Mandarin is the official language (or one of the official languages), so knowledge of Mandarin will be helpful - someone in the vicinity will probably speak it, even in little towns.
@pb - I wouldn't use the shewee to pee in the open, if I had it. Would still find a corner or isolated place. However, there were some instances during my travels & peeing was inconvenient that I wish I had a shewee!