This kind of thing happens quite often:

SHANGHAI, China (AP) -- College students in central China smashed offices and set fires in a riot sparked by administrative changes that made their diplomas less prestigious, students and school administrators said Monday.

Photos of the weekend riots posted on the Internet showed fires set in debris-strewn school courtyards and glass smashed in administrative offices, shops, cars and a bank.

...

There was no mention of the apparent riots in the country's state-controlled media.

Emphasis mine. Interesting to see stuff that finds its way out on the net, even with their American-made "great firewall".