Lin Yan traveled through the Renzong Dynasty of the Northern Song Dynasty and became the ninth-rank county magistrate who was relegated to the barren Qinghe County. As soon as he took office, he encountered a locust plague and food supply was cut off. At a critical moment, he activated the knowledge base of modern civilization, learned about agricultural and industrial infrastructure from the top, and made plans with power from the bottom. Making refined salt, improving farm tools to alleviate the food shortage, practicing rural bravery, punishing evil gentry to establish prestige, revitalizing the county step by step, and shocking the court. Faced with the pressure of powerful ministers and surrounded by foreign enemies, he relied on his advanced cognition to move forward step by step, from a small official on the border to a man of power, rewriting the fate of the weak Northern Song Dynasty, and finally becoming a famous official of the ZTE! Who would have thought that the demoted official whom everyone despised at the beginning would become someone that the court did not dare to mess with?