Chen Yan, a graduate student in the Department of Modern History, accidentally traveled to the most difficult years of the Shu Han Dynasty after the Battle of Yiling, and became an inconspicuous bookkeeper next to the emperor Liu Chan. At that time, the Shu Han elite was depleted, internal and external troubles arose, and despair permeated the government and the public. Liu Chan was regarded by the world as "A Dou who cannot be helped."
Chen Yan, who was well aware of the outcome of the Shu Han's downfall, did not want to see Han Zuo cut off, and decided to rely on his historical knowledge to assist Liu Chan in turning the tide. He was dormant, first stabilizing domestic affairs with people's livelihood policies, encouraging farming, promoting water conservancy, and regulating officials, and gradually gained Liu Chan's trust; then he reconciled with the generals in the court, bridged factional rifts, and helped Zhuge Liang reduce the burden of domestic affairs; militaryly, he abandoned the disadvantages of the blind expedition to the north and suggested a slow and steady approach, managing Yongliang, connecting Qiang and Hu, and optimizing military logistics.
With Chen Yan's step-by-step planning and Liu Chan's gradual growth, Shu Han quietly accumulated strength and transformed from a weak and peaceful country into a powerful force eyeing the world. They rejected Cao Wei in the north, allied with Soochow in the east, and waited for opportunities to profit. After decades of battles and management, they finally defeated Luoyang and Xia Jianye, ended the troubled times, revived the power of the Han Dynasty, and created a legend of assisting Zen and revitalizing the Han Dynasty.