在圣地延安的旅游景点中,七大会址杨家岭中央大礼堂和中共中央办公厅大楼是游人们必到的地方。在讲解员动情的讲解中,人们经常可以听到这样一段介绍:中央大礼堂能容纳千人,是土木结构,但没有一根立柱。办公厅大楼布局合理、巧妙,是延安第一幢三层楼建筑。这两座建筑坚固耐用,直到今日都完好如初能够正常使用。那时候,建筑材料都是就地取材,没有钢筋 Among the tourist attractions in the sacred site Yan’an, the Yang Jialing Central Auditorium and the CPC Central Committee’s General Office Building at the seven major sites are the places where visitors must visit. In the explanation of the commentator’s emotions, one often can hear such an introduction: The central auditorium can accommodate thousands of people, is a civil structure, but does not have a column. The office building layout is reasonable and ingenious, is the first three-storey building in Yan’an. Both buildings are rugged and can be used as normally as they are today. At that time, the construction materials were made locally without reinforcement