难忘七月二十八唐宝心“七七事变”发生在署假期间，清华园里只留有二百多位同学。署期同学会组织留校同学每天下午四时在同方部（小礼堂）非正式聚会，通报信息。信息的来源渠道有三个：一个是图书馆阅报室里北平和天津的报纸，一个是学校当局转达的官方消息，一个是北平... Unforgettable July 28 Tang Bao Xin “Incident of July 7” took place during the departmental leave. Tsinghua University only left over 200 students. Students from the Department of Student Association organize students to be present at informal meetings at the same department (small auditorium) at 4:00 a.m. daily to inform them of the information. There are three sources of information: one is the newspapers in Beiping and Tianjin in the library’s reading room, one is official information conveyed by school authorities, and the other is Peking ...