Chen Yan, a student of modern engineering, accidentally traveled through the Qin Dynasty. With the ability to create composite bows, improved trebuchets and other technologies in ancient times, he rose from a handyman in Xianyang Gongfang to an important minister. He solved the problem of mass production of weapons, promoted technical standardization, and helped Qin Shihuang to attack the Xiongnu in the north, connect the Western Regions in the west, conquer Nanyang in the south, and conquer Europe in the west. In the court intrigues and global conquests, he used the power of science and technology to rewrite the fate of the Qin Dynasty, and finally assisted the Qin Dynasty to become a global empire spanning Europe, Asia, Africa, and the United States.
