Chen Yan, a modern history enthusiast, accidentally traveled to the twelfth year of Jianxing, which coincided with Zhuge Liang's death in Wuzhangyuan and Shu Han's internal and external difficulties. He served in Chengdu as a poor scholar. With his familiarity with the situation of the Three Kingdoms and his pragmatic strategies, he gradually gained Liu Chan's trust.
Internally, he rectified the administration of officials, improved farming and mulberry trees to fill the government treasury, reconciled the conflicts between the Jingzhou faction and the Yizhou gentry, and stabilized the rear; externally, he assisted Liu Chan in adjusting the strategy of the Northern Expedition, using defense as offense to accumulate strength, while maintaining the Wu-Shu alliance and dividing Cao Wei's internal affairs.
Chen Yan always took "auxiliary" as the key link to help Liu Chan get rid of the label of "mediocre leader" and consolidate the national power of Shu Han. After more than ten years of management and conquest, the Shu Han Dynasty first defeated Cao Wei and then conquered Soochow. Finally, Liu Chan came to Luoyang and restarted the unification of the Han Dynasty. Chen Yan also became the key driver to witness this historical turning point.
