Imgur currently has pictures of Chinese rioting that are disturbing. Claims by China are being made over some islands that were sold by their Japanese owners to Japan. In the
Good Guy Chinese dude in Xian here below is telling motorists that rioters ahead are destroying all Japanese made vehicles. 
The Voice of America Blog has several articles on the unrest including:
- Anti-Japanese Demonstrations Prompt Chinese Discussion of Patriotism and
- US Defense Chief in talks Over China-Japan Tensions
EDIT:
Discussion with experts in the field of China studys point to a long history of protest in China, and that in a country so large, we should not go too far in ascribing meaning to individual actions.
