protest - Shanghai sees rare protest against Cultural Revolution

About 150 people demonstrated on Wednesday in Shanghai to mark the start of the Cultural Revolution forty years when they are forced to work on the country side, Reuters reports. While surrounded by a large amount of police, the mostly elderly protestors were allowed to stand all day in front of the Civil Affairs Bureau, in charge of citizen's complaints.
Also, the Cultural Revolution (1966-1976) has been off-limits in media and certainly officially allowed protests are pretty unique.