During the reign of Renzong in the Northern Song Dynasty, in the Jianghuai region, modern agricultural technician Su Changgeng traveled through time and became a tenant farmer Su Changgeng who rented land from a landlord. After paying the rent, he only had half a bag of brown rice left. The thatched cottage he lived in was leaky, his wife was still pregnant, and the landlord's housekeeper always withheld seeds. Looking at the barren soil and outdated farm tools, he decided to use modern agricultural technology to "change his destiny": first, improve the curved shaft plow (adding a small part to save 30% of the labor), and then engage in "compost fermentation" (which is more fertile than spreading manure directly), so that the yield of the three acres of land rented by his family is 20% higher than that of other families, which is barely enough to feed the whole family. Faced with the landlord's challenge to increase the rent, he argued with his "high-yield account book" and argued hard. Later, he persuaded the landlord to implement a "sharecropping system" (the overharvest of grain was divided in proportion), and led other tenant farmers to use new technologies together. He also secretly established "mulberry and fish ponds" (planting mulberry and raising silkworms, raising fish in ponds, and recycling). From a tenant farmer who was squeezed by landlords to "Mr. Su" who was able to negotiate terms with landlords and help his fellow villagers get rich, he lived a life of dignity and hope step by step in the farming society of the Northern Song Dynasty by relying on his solid farming skills.
