Zhao Xing, a man from science and engineering, died suddenly after staying up late at night. When he woke up, he became the sick and concubine of a run-down family in the Northern Song Dynasty. He was left to die in a deserted village. There are bandits outside and wolves inside. There are only 404 days left before the humiliation of Jingkang. While others were still reciting poems and writing poems, he had already clicked on the "Industrial Revolution Database" in his mind - boiling salt, making steel, and making gunpowder. Are golden soldiers and cavalry good at fighting? I want to show you what dimensionality reduction attack is!