Transmigrated as a Three-Year-Old, Doing Infrastructure in the Eastern Jin

Lin Huaiyuan, a modern genetics researcher studying the southern migration of the Western Jin, is struck by lightning and wakes up as a three-year-old child of a fallen minor aristocratic family during the Yongjia Rebellion. No cheat powers. With Luoyang sacked and barbarians massacring the city, his family flees south, facing starvation, conspiracies, and his uncle's schemes. As a helpless toddler, he can only swallow his knowledge of modern farming, herbal medicine, and infrastructure. From reclaiming wasteland to planting rice, using herbs to save the Shanyue tribes, and from being bullied by Jiangnan aristocrats to improving irrigation and fertilizer, he leads refugees, allies with the Shanyue, and builds a stable home. In a chaotic era, he turns barren hills into fertile fields, becoming an untouchable pioneer in Jiangnan. The chaos is harsh, but farming and infrastructure truly win.