Ouyang Xuan, a chemical engineering major, had difficulty finding a job, so he had to take the exam as a county business editor and work as a librarian. Unexpectedly, he traveled to Chongqing Mansion in the Shu region at the end of the Southern Song Dynasty.
At this time, the land of Bashu was in ruins due to the Mongolian invasion. In order to survive, he escaped into the mountains with a group of Xiang army soldiers.
He used his historical knowledge and modern technology to develop industry and technology, reform the political system, and use thermal weapons to drive the Mongols out of Sichuan.
After the fall of the Southern Song Dynasty, he sent his army north to regain the Central Plains and drove the Mongols to West Asia and the west of the Ural Mountains.
At the same time, they expanded their territory, established colonies in America, Australia and Africa, and realized a republic of all ethnic groups.