It looks like every country in the world uses a different kind of electrical outlet. Don't take the outlet for China literally, though- when I went, I took eight kinds of adaptors and used several in different cities. Then we stayed in one city that couldn't use any of them, so my video camera battery ran down. The explanation at Fail Blog:
This is meant to be a visual guide, as many similar outlets have different voltages. Just because a plug fits doesn't mean it will work. Always double check before you blow up your cell phone/hair dryer/discount lightsaber.
-via Geeks Are Sexy