1979年12月8日，一名男子在北京月坛公园的 “大字报墙 ”上悬挂手写的 “大字报”。中国当局于 12 月 7 日关闭了 “民主墙”，并于次日开放了 “大字报墙”，只有获得授权的人才能进入。大字报是不满者表达意见的唯一途径。 BEIJING, CHINA - DECEMBER 8: A Chinese man hangs a hand-written "dazibao" 08 December

1979年12月8日，一名男子在北京月坛公园的 “大字报墙 ”上悬挂手写的 “大字报”。中国当局于 12 月 7 日关闭了 “民主墙”，并于次日开放了 “大字报墙”，只有获得授权的人才能进入。大字报是不满者表达意见的唯一途径。 BEIJING, CHINA - DECEMBER 8: A Chinese man hangs a hand-written "dazibao" 08 December 1979 at the "Dazibao Wall" in the Altar of the Moon Park in Beijing. The Chinese authorities closed the "Wall of the Democracy" 07 December and opened "the "Dazibao Wall" available only to authorized people the following day. Dazibaos were the only means for dissatisfied people to express their opinion. (Photo credit should read FRANCIS DERON/AFP via Getty Images)