Traveling through time and becoming a soldier in the border army at the end of the Ming Dynasty, Xiao Yi thought he was getting a hell script. Until he discovered that his baggage contained "High School History Compulsory Course" from the future. Huang Taiji detours to Mongolia? There is a map in the book; King Chuang's march route? There are markings in the book; artillery blueprints, epidemic prevention manuals... It's all in the book! When the Eight Banners Iron Cavalry came to Beijing, Xiao Yi led a mysterious new army to appear. Chongzhen tugged on his sleeves and choked: "What should I reward you for?" Xiao Yi's hand when turning over the book froze: "Your Majesty, the book said that you finally... Hang yourself on the southeast branch?" The monarch and his ministers looked at each other in silence, but suddenly an urgent message came from the distance - "No! The Jiangnan Donglin Party is forcing the palace!"
