Lin Yan, a modern young man, traveled through time and became the magistrate of Dayong County. At the beginning, he used cement roads, toll booths, and glass mirrors to shock the emperor who was visiting privately in disguise. He cultivated salt fields, built ports, and built artillery. The people called him "Lin Qingtian" and the court called him "hugely corrupt." The emperor saw with his own eyes that he paid subsidies for demolition and tried cases without paying for his life. He was so angry that he couldn't help copying his homework. When the warships defeated the Japanese pirates and the sea trade silver rolled in, the emperor on the dragon throne looked at the report and fell into deep thought: How did this corrupt official make my country richer and richer? All the people in the dynasty would only advise me to be frugal, but this "corrupt official" earned me half of the treasury!