Lin Yu, a graduate student in the Department of History, is obsessed with the study of Zhenguan history. While analyzing the Zhenguan tax remains in the laboratory, an unexpected explosion caused him to travel back to the Zhenguan years. When he first arrived on the streets of Chang'an, facing a strange environment and survival problems, Lin Yu relied on modern knowledge and understanding of Tang history, starting from exchanging pens for money, selling novel objects in the market, and emerging at a poetry club. He gradually gained a foothold in this ancient era and started a legendary journey.
