Forty-six years ago today, on December 6, 1979 (October 17 of the lunar calendar), big character posters were banned on the Xidan "Democracy Wall". The famous Xidan "Democracy Wall" On December 6, 1979, the city of Beijing stipulated that in the future, anyone who posts big character posters outside their own unit is only allowed to post them at the big character poster posting place in Yuetan Park, and it is forbidden to post them on the "Xidan Wall" and other places. Since 1979, a large number of big character posters have appeared in Xidan, Beijing. Some of the content involves attacking the Communist Party and the current system and attacking party leaders. The "Xidan Democracy Wall" is called the "Xidan Democracy Wall". In order to tighten control over this, the Beijing Municipal Revolutionary Committee has issued new mandatory regulations. According to this regulation, those who post big character posters must truthfully register their names, units, residential addresses and other contents at the registration office of the posting office. The big character poster shall not be censored by the registration office. The poster shall bear political and legal responsibility for the content of the big character poster. It is forbidden to make trouble without reason, pick quarrels and provoke trouble at the posting office of big character posters.