Xu Zhiyan, a graduate student at the Agricultural University, woke up and transformed into the most insignificant seventh prince of the Dayin Dynasty. Good news: He is a prince, so he has no worries about food and clothing. Bad news: The mother and concubine died young, the emperor's father thought he was invisible, the brothers were all werewolves, the crown prince's position was a life-and-death fight, and he... Was sent away instantly as cannon fodder. Xu Zhiyan looked at the barren fiefdom he was "assigned" to when he was young, and then thought about the man-eating gold-selling cave in the capital, and decided to lie down: Fighting for hegemony? Involution? Farewell! I just want to be a happy salted fish lord! So - while the princes in the capital were fighting for wisdom and courage for Bo Shengxin, the seventh prince was leading an old farmer to study rice hybridization. While the court ministers were forming cliques for political achievements, the seventh prince was planning water conservancy projects in the fiefdom to solve the millennium drought. When the warning of an enemy invasion came from the border, the seventh prince's fiefdom had already accumulated mountains of food and grass, strong soldiers and horses, and even started to engage in reverse economic and cultural exports. Emperor's father & brothers: "...?!" Where is the useless salted fish that we promised? How come your fiefdom is richer than the national treasury? ! Where did your new harness and high-yielding grains come from? ! Facing everyone's shocked gazes, Xu Zhiyan clasped his hands with an innocent look on his face: "I really just want to farm. Who knew that I would accidentally become... Rich as a country?" Later, the princesses from neighboring countries who he rescued, the wealthy merchants who he inspired, and the knights and knights in the world who were impressed by his charisma all became his die-hard fans. A certain ambitious family member who has been lurking beside him and wanted to replace him is doubting life every day: "Your Highness, what are you planning?