19 13 After graduation, I went to Japan to study politics at Waseda University in Tokyo. In the turbulent era of war and hard life, Li Dazhao developed a feeling of worrying about the country and the people and a calm and strong character from an early age. 19 15, Japanese imperialism put forward "Article 21" to destroy China, and Li Dazhao actively participated in the protest struggle of students studying in Japan. He electrified "Tell the National Father" to spread all over the country and became a famous patriot. "Iron shoulders bear morality and write articles skillfully." 19 16 after Li Dazhao returned to China, Cai Yuanpei was recommended by Zhang to be the director and professor of economics of Peking University Library, and actively participated in the emerging new culture movement, becoming a leader of the new culture movement.