Zhang Wei traveled to the Three Kingdoms and became a distant relative of Liu Bei. Zhang Wei did not like Cao Cao's massacre of the city and Xuzhou, so he chose to help Liu Bei and help Liu Bei rejuvenate the Han Dynasty.
In order to strengthen the relationship with Liu Bei, Zhang Wei followed Liu Bei to do things after time travel, so that he could join the Taoyuan Three when they became sworn brothers.
A month later, he finally got his wish and became sworn brothers with Liu Bei, Guan Yu and Zhang Fei.
The Liu Bei Group has gained momentum since then. Zhang Wei, Liu Bei, Guan Yu, and Zhang Fei led troops to quell the Yellow Turban Rebellion, and then defeated Dong Zhuo, defeated Yuan Shao, pacified Yuan Shu, and defeated Cao Cao... Zhang Wei relied on his previous life knowledge and foresight to help Liu Bei recruit famous counselors and generals of that period, assist Liu Bei in defeating all the heroes in the world, reunify the Han Dynasty, and rebuild the Han Empire.
