A street food vendor in Sanya, Hainan was beaten by a chengguan after an argument broke out over the position of her cart and its obstruction of traffic.

It is controversial videos and photos like this that inform netizens of the underlying issues and rising tensions between the authoritative forces and street vendors.They are forced to defend themselves against officials while trying to survive in an environment that no longer sustains them.

http://www.chinasmack.com/2009/stories/street-peddler-beaten-paralyzed-by-shanghai-chengguan.html