I passed through the body of Gu Chengan, a scholar from a poor family in Bianzhou, Daliang Dynasty. He started to live with the daughter left by his deceased brother on his back. He was a father while preparing for the exam. He was so poor that even the inkstone cracked. On the surface, this world is a traditional dynasty, but in fact, the court regards "Essays on Classics and Meanings" as the only threshold for selecting talents to govern the world. However, I have a set of "economic arithmetic and governance models" from later generations in my mind, which can integrate land tax, water conservancy, military rations, and disaster situations. However, the imperial examination only recognized the articles of sages and did not recognize practical matters, and local powerful people and elite scholars did not want anyone to use their "real skills" to destroy their jobs. What I have to do is not only pass the exam, but I also have to protect my children, guard my conscience, and turn the articles on paper into a living decree.