I Work as a Postman in the Ming Dynasty

In the last years of Hongwu, the time traveler Chen Yuan became a postman on the border of Yongchang, but with the help of modern economic thinking, he glimpsed the shocking smuggling network through the loopholes in the account books. He was appreciated by his staff, and used "border affairs bonds" and "franchised business introduction" and other ingenious strategies to solve the emergencies of border troubles. He counterattacked from corrupt officials and became a household manager in charge of finance and trade. However, the New Deal deliberately touched deep waters, and after bringing down the wealthy businessman Yang Chongyi, the "Black Stone" phantom, overseas mafia, Shilin criticism and the cold arrows within the government became intertwined. While Chen Yuan was innovating the tax system and sorting out border trade with business skills that transcended the times, he was dealing with internal and external enemies in the fog, setting up a dangerous situation between the border settlements and the Yongchang city. He vowed to find a way to defeat this war-torn land in this life-and-death chess game that combines business warfare, espionage and intrigue.