The New York Times has a really cool article on the rise of home-grown underground hip hop in China: Now Hip-Hop, Too, Is Made in China. Make sure you watch the little video feature on the side, "The Underground Chinese Hip-Hop Movement." It's pretty fascinating.
The article profiles a few of the people who are making waves on the scene, including the group Yin Ts'ang, described as one of the pioneers of Chinese rap, which is apparently blowing up.
This doesn't really come as a surprise, right? Hip hop might've started in the New York, but its international reach is far and wide, and it's only natural that such a rebel art would sprout out from under the shadows of a society and government like China's.