1935年,日本帝国主义发动九一八事变,侵占我东北三省。又进一步侵略华北,炮击山海关,热河危急。日寇又指使汉奸欲在冀东成立傀儡政权。而当时的国民政府屈膝让步,准备接受这一掠夺要求。日寇的步步蚕食,国民政府的节节退让,激起了北京学生的愤怒。学生们在中共地下党的领导下,放下书本,走出校门,举行了“一 In 1935, the Japanese imperialists launched the “September 18 Incident” and invaded and occupied the three northeastern provinces. Further aggression in North China, shelling Shanhaiguan, Jehol critical. The Japanese invaders also directed the traitors to establish a puppet regime in Jidong. At that time, the Kuomintang government made concession to concessions and was ready to accept this plunder request. The step by step encroachment by the Japanese invaders, the steadfast concession of the national government, aroused the anger of Beijing students. Under the leadership of the underground party of the Chinese Communist Party, the students dropped their books and walked out of their schools to hold "1