In the twelfth year of Jian'an, Chen Yan, a modern history enthusiast, accidentally traveled to Liaodong. It happened that Gongsun Kang had just killed Yuan Shang and Yuan Xi had stabilized the situation, but he faced the dilemma of the pressure of Cao Cao's power and the harassment of surrounding tribes. As an ordinary counselor with no background or special abilities, Chen Yan relied on his accurate understanding of the situation in the Three Kingdoms to first provide suggestions to rectify the government and reclaim the fertile fields of Liaodong to accumulate grain. Then he helped Gongsun Kang improve ordnance and train cavalry to strengthen the army, gradually resolving internal conflicts and external threats.
He was well aware that the foundation of Gongsun Kang's camp was weak, so he avoided a premature confrontation with Cao Cao, and instead planned to expand the strategic space on the Korean Peninsula, secretly linking up with the anti-Cao forces in Yizhou and Jingzhou to form a containment. From a corner of Liaodong to the invasion of Youji, from fighting against Cao Wei to confronting Sun Wu, Chen Yan took history as a guide and assisted Gongsun Kang to break the pattern step by step in the turbulent and chaotic times of the Three Kingdoms, and finally found a path to unification that was different from history.
