Picture introduction: The cultural relics and pictures in the exhibition hall include: Cai Yuanpei’s appointment letter as the president of Peking University, the manuscript proposing the idea of "inclusiveness"; letters from Li Dazhao, Lu Xun, Yang Changji, Gao Junyu, Guo Moruo and others; Li Jinxi, Wu Yu's diary; vernacular poetry manuscripts by Chen Duxiu, Hu Shi and others; leaflets distributed by May Fourth patriotic students; photos of Qian Xuantong, Liu Bannong, Shen Yinmo and others, and a large number of precious cultural relics.