Zhang Wei, a graduate student in the Department of Physics, traveled through time and became the Wanli Emperor. Facing the Ming Dynasty, where Zhang Juzheng was in power and faced internal and external troubles, he planned reforms from a future perspective: reorganizing military equipment, promoting practical learning, and breaking up party strife. More importantly, the 19-year-old Jurchen named Nurhaci in Liaodong will become his biggest variable in reversing the fate of the country.