Cui Feihun, a graduate student in the Department of History, traveled through the late Sui Dynasty and became a soldier at the bottom of Qi County. With historical foresight and military knowledge, he survived the uprising of Wang Bo and the rise and fall of Wagang, and met famous generals such as Qin Qiong and Li Ji. Later, he returned to the Tang Dynasty to assist Li Shimin, and made suggestions for the battles of Qianshuiyuan and Hulao Pass, helping to stabilize the world. Finally, he retired from the Zhenguan Dynasty and used his talents to protect the people.