In the second year of the Chongzhen reign of the Ming Dynasty, half a month after Yuan Chonghuan defeated the Miziharashen tribe, the soul of a future man replaced the original ruler of this corrupt dynasty, Emperor Chongzhen. After quickly understanding his situation, he needed to make the right decision as quickly as possible. He had to change the situation on the Ming-Jin border within half a year and protect hundreds of thousands of settlers in the border areas. He must not repeat the same mistakes and allow Huang Taiji's Manchu and Mongolian troops to break through this important border pass. So? Zhu Youjian. What should we do?