北洋裂变：军阀与五四

Written by Zhang Ming, this book centers on the May 4th Movement and focuses on the Zhili - Anhui War between Feng Guozhang and Duan Qirui after Wang Shizhen, one of the three outstanding figures of Northern Warlords, retreated, as well as the rise of Wu Peifu, the third generation force of Northern Warlords. The book restores the real activities and corrects various mistakes in the text book about various figures in the May 4th Movement which lasted many years and greatly affected the political trend later.