Lin Zhao, a graduate student in the history department of Nanjing University, traveled through the Western Han Dynasty and became Wang Mang, who had just been driven back to his fiefdom by Emperor Ai of the Han Dynasty. Ding Fu's relatives in the court want to get rid of him quickly, and the powerful in the world regard him as a dog in poverty. What should we do? Lin Zhao chose to go through the fiefdom household registration book first. Improve iron smelting, promote crop rotation, set up literacy schools, and use economic means to force the powerful people who made private money to death - by the time the court reacted, the new capital was full of grain, iron, and people's hearts. From the fiefdom experimental field to the national chess game, from currency reform to the beginning of firearms, this is a history of conquest by modern people with two thousand years of knowledge reserves to build hard-core infrastructure in the late Western Han Dynasty. He will eventually become emperor, but this time, the "New Dynasty" is no longer a short-lived dynasty of fourteen years, but starts from Chang'an and goes all the way to the world.