I do not speak Chinese.
Largely because there is no such thing. China's citizens speak anywhere from 30 to 300 different languages depending on your inclination towards pedantitude. Mandarin is the most spoken language, although it doesn't carry the same expectations and usefulness, say, as standard High German does throughout Europe.
Mandarin is not the primary language of Fujian (the area I will visit during the Horner Exchange). It's Min. Yet, most language learning tools I've found only cover Mandarin.
Normally, before any trip, I study the language, dip my toes in the water at least enough to say Thank You and Where's the bathroom? I also rely on my, if I do say so myself, strong ability to learn a language in situ and communicate via a combination of clowning and telepathy.
But China... What I've heard from friends who have gone before me, is that no matter how much or how little they studied before the trip, once there, it was if they had done nothing. If that's the case, I'm seriously thinking about just winging it.