建国50周年庆典之际,雄伟壮丽的天安门格外引人注目,不少细心的人说:“天安门好像长高了！” 1970年,天安门曾被彻底拆除,又全面重建,她就是在重建中“长高”的。这件事当时不仅全国人民不知道,北京市民不知道,就连在故宫博物馆、劳动人民文化宫和中山公园的所有工作人员也都不知道。当年,这是国家的“一号机密工程”。为了不至于影响当时频繁的各种集会,“一号机密工程”要绝对保密,这是世人不知的原因。 On the occasion of the 50th anniversary of the founding of the People’s Republic of China, the grand and magnificent Tiananmen Square attracts many people’s attention. Many attentive people said: “Tiananmen Square seemed to grow taller!” Tiananmen Square was completely demolished and rebuilt in 1970, Grow taller “. At that time, not only did people in Beijing not know it, Beijing citizens did not know it. Even the staff at the Palace Museum, People’s Cultural Palace and Zhongshan Park were not aware of it. That year, this is the country’s ”No. 1 confidential project.“ In order not to affect the frequent rallies at that time, ”No.1 Encryption Project" must be kept absolutely confidential, which is why people in the world do not know.