The Seventeenth Year of Chongzhen in the Late Ming Dynasty

A modern history student traveled through time and became the crown prince of Chongzhen, Zhu Cixang. The time point is March 15th in the 17th year of Chongzhen (the tenth day before Li Zicheng broke the capital). He carries the [Chinese Civilization Strengthening System] (needs to complete historical change tasks to gradually unlock skills. At the beginning of the time travel, he rescued Chongzhen and Zhou Hou in a certain death situation. Combining meager strength, with extraordinary courage and prophetic information, he led his core team and some elites from the capital to successfully break through the encirclement on the eve of the fall of the capital. They gathered the defeated troops, resettled the refugees, and met heroes, and gradually established the core of anti-Qing leadership in Nanjing, and finally established a great empire on which the sun never sets!