Chen Mo, a graduate student in the Department of Modern History, accidentally traveled to the fourth year of Jian'an in the Eastern Han Dynasty, which was the eve of the critical confrontation between Cao Cao and Yuan Shao in Guandu. Without any fantasy help, he only relied on his familiarity with the history of the Three Kingdoms and his pragmatic way of doing things, starting from a document in the Yanzhou military camp.
Chen Mo first attracted Cao Cao's attention because he proposed a specific plan to improve farm storage and alleviated Cao Jun's food pressure. Later, before the Battle of Baima, he suggested adjusting the formation angle of the vanguard troops based on local geography and hydrology, which helped Cao Cao's army reduce casualties and achieve a small victory, gradually gaining trust. After that, he followed Cao Cao in the southern and northern wars. On the eve of Red Cliff, he warned against the risks of southeast monsoon and fire attack. He perfected the logistics dispatch method during the western expedition to Ma Chao. In domestic affairs, he assisted in sorting out household registration and promoting the refinement of laws to stabilize the place. He always adheres to a pragmatic heart and does not seek personal power. He only seeks to use what he knows and learns to help Cao Cao avoid the regrets in history, gradually integrate the north, pacify the south of the Yangtze River, and finally witness the unification of the nine states, leaving his own faint mark in the end of the troubled times.