The time traveler Cao Zheng came to the end of the Han Dynasty with a mysterious bronze sword in hand, and assisted Cao Cao in starting a hegemony that subverted the era. Starting from Yanzhou, he relied on his knowledge that transcended the times to establish a craftsmanship camp to realize blast furnace steelmaking and innovate weapons; he implemented the farming system to solidify the foundation; he also established a field hospital and introduced alcohol disinfection, saving the lives of countless soldiers.
During the expedition, he rescued the talented Cai Yan, attracted the wise and brave Diao Chan, and even fell in love with Lu Bu's daughter Lu Lingqi on the battlefield. With the planning of Guo Jia, Xun Yu, Jia Xu and other strategists, and the charge of five good generals, Cao Zheng's technology became the winner: the improved crossbow controlled the battlefield, the thunderbolt shocked the enemy's courage, the Modao formation stunned the cavalry, and finally used the red cannon to open the way to the unification of the world.
With his assistance, Cao Cao ascended the throne as Emperor Wu of Wei eight years ahead of schedule. Cao Zheng was granted the title of Duke of the Town and shared the honor with his three wives. After the world was settled, he promoted the imperial examination, compiled legal codes, and built medical clinics extensively, laying the foundation for a prosperous age. After Cao Cao's death, Cao Zheng assisted Cao Pi in successfully succeeding to the throne. Finally, he retired after success, returned to seclusion with his sword, and became one with the fate of the country, becoming an immortal legend.
