In the first year of Yongle of the Ming Dynasty (1403), the Battle of Jingnan had just ended, and not long after Zhu Di, the founder of the Ming Dynasty, ascended the throne, the world was initially settled but undercurrents were surging. The capital is still in Nanjing, Peiping has not yet been renamed Beijing, and Zheng He is about to begin preparations for his first voyage to the West. At this time in the Ming Dynasty, the handicraft industry was booming, but it also faced technical bottlenecks; the imperial examination system was perfect, but there was also the problem of class solidification. Lin Yuan, a doctor of modern materials science, accidentally traveled here and possessed the body of a down-and-out scholar of the same name in Yingtian Mansion. With the knowledge of modern science and engineering and the massive data stored in the smart bracelet, he embarked on a journey to change his own destiny and influence the course of history.
