When the soldiers approached the city, an open love letter opened the prelude to the life-and-death decision of the four classmates of the Kuomintang Military Medical School. Xiao Zhuoran, an underground party member, took a salary from the bottom of the kettle, instigated a counterattack from his classmates, and became the leader of the new regime; Cheng Xianjue accepted Wang Yishi's persuasion, rushed to the wind and rain bridgehead first, and joined the uprising team; Wang Yishi, who was coerced by the spies, persuaded Zheng Huoshan to revolt with a gun, but by mistake, they were both captured. The fate of the four people has since been divided, the previous sports have come and gone, love and friendship have turned around, and their careers have their own merits...... The works focus on the big picture and start small, reflecting the changes of an era and the mental journey of a generation from the micro changes of personal destiny. This book won the 11th Five One Project Award of the Propaganda Department of the CPC Central Committee.