Qin Yuan, a doctor of military history and retired special forces soldier, traveled through time to the pavilion chief of Wujiang. At this time, Xiang Yu was surrounded by enemies and was about to die. Qin Yuan awakens the [Chinese Heroes Catalog System]. As long as he changes the historical process and expands the territory, he can unlock the military techniques, formation diagrams and even the heroic soul inheritance of five thousand years of famous generals in future generations. Qin Yuan stopped Xiang Yu and taught Xiang Yu the lightning warfare method of [Huo Qubing·Fenglang Juxu]. When the overlord of Western Chu learned blitzkrieg, the nightmare of the Han army came! As the governor of Western Chu, Qin Yuan not only used later generations of military techniques on the battlefield (Li Jing's Six Army Mirror, Yue Fei's Beiwei Army Formation) to make Han Xin doubt his life, but also threw out the imperial examination system and favor orders in the court, fundamentally disintegrating Liu Bang's rule. Xiang Yu is responsible for conquering the world, and Qin Yuan is responsible for governing the country and ensuring peace. The two of them joined forces to not only destroy Liu Bang, but also planted the black dragon flag of Dachu all over the Xiongnu, Kushan, Anxi, and even to the top of the Roman Empire.