Chen Xi, an ordinary college student in the 21st century, returned to Xuchang during the Jian'an period of the Three Kingdoms after an accident. When he stood in the war-torn land of the Central Plains wearing a coarse short-sleeved shirt, he had no magical golden fingers, only the knowledge map accumulated by five thousand years of civilization in his mind. Relying on his vague understanding of historical trends and modern logical thinking, he started by explaining crop rotation technology to the people in the fields. He successively presented strategies for improving columbists and burning grain in Guandu under Cao Cao's account, and he saw through the serial conspiracy before the Battle of Chibi. He dealt with the Yingchuan family and the Cao clan, shocked the court with his "basic son discussing politics", and determined people's livelihood with "chasm water control", and assisted Cao Pi to win in the dispute between the princes. When the heaven-sacrifice drums sounded in the first year of Huangchu, Chen Xi stood on the top of the Bronze Bird Tower and reconstructed the household registration, measured the land, and organized the administration from a modern perspective. In the end, he helped the Wei cavalry break through the barriers of Shu and Wu. Without changing the historical background, the process of unifying the nine states was imprinted with modern wisdom.
