Chen Yan, a graduate student in the Department of Modern History, accidentally traveled through time, which coincided with the first year of Jianxing of the Shu Han Dynasty after the defeat in the Battle of Yiling. At this time, Liu Chan ascended the throne for the first time. The elite of the Shu Han Dynasty were exhausted, and they were besieged internally and externally. Cao Wei was watching in the north, Sun Wu was in the east, and the barbarians in the south were ready to move. Without the blessing of a golden finger, Chen Yan only relied on his solid historical knowledge and pragmatic acting style to start from a low-level official and work step by step. He declined empty talk, urged Liu Chanping to retreat from the traitors, assisted Zhuge Liang in stabilizing domestic affairs and improving military discipline, offered appeasement strategies to reduce losses during the Southern Expedition, and proposed logistical supplies and tactical fine-tuning during the Northern Expedition. He worked among capable ministers and generals such as Zhuge Liang, Jiang Wei, and Jiang Wan, bridging the gaps between factions, promoting agricultural, mulberry, water conservancy, salt and iron innovation, and accumulating national strength. Faced with the fact that Liu Chan was not an extremely ignorant person, Chen Yan used historical facts as a guide and followed persuasion to help him lose his cowardice and gradually develop an imperial mentality. After decades of painstaking efforts, the Shu Han Dynasty went from being precarious to having a strong army and horses, and finally defeated Qishan, conquered Yongliang, united with Wu and defeated the Wei Dynasty, pacified Jiangnan, and swept the Central Plains. It bucked the trend in the troubled times. Liu Chan ascended the altar to worship heaven, completed the great cause of unifying the nine states, and rewrote the historical destiny of the Shu Han's downfall.
