Ming Dynasty: from Domestic Slave to Regent

In the fifth year of Chongzhen's reign, Zhao Yan, a graduate student in the Department of Modern History, traveled through time and became a domestic slave of Shanxi merchants. Awakening the "Mountain and River Illustrated Book" system, he can communicate with the remnant souls of famous generals from past dynasties to learn the art of war, but he was hunted down for accidentally touching the master's secrets. While fleeing with his little sister, he relied on the guidance of Zhang Juzheng's residual soul to improve weapons, used his residual soul to train refugees, and used Xu Guangqi's residual soul to promote sweet potato cultivation. When Li Zicheng's horse hoofs trampled through Taiyuan and Dorgon's cavalry crossed the Great Wall, Zhao Yan stood at Ningwuguan holding a flintlock gun: "In this troubled world, it is I who should set the rules!