I Transmigrated to Great Tang and Became Sun Simiao’s Disciple from the Start

【History + alternate universe + duke + military + development】 Li Mian accidentally transmigrates to the Tang Dynasty and unexpectedly becomes a student of Sun Simiao. Seeing how much hardship the common people endure, he invents the curved-shaft plow and catches Emperor Li Er's attention. For his achievements, he is granted the title of Baron of Lantian County. He thinks he can now lie flat, but Li Er wants to use him as a tool and a blade against the great clans, dragging him into the struggle between the aristocratic families and the imperial house. What should he do? How can he escape the fate others have arranged for him and fight his way to survival? Under mounting pressure, Li Mian begins to plan carefully, one step at a time. He combats smallpox, presents rice seeds, battles the great clans, joins the army on its campaign against Goguryeo, conquers Japan, and develops the southern frontier. Queen of Japan: “He's my husband, and the father of my child.” Princess Changle: “He's my husband. Father, you can't treat him like a packhorse.” Child bride Yang Qiuer: “Li Mian is my husband, and my whole world.” Queen of Silla: “Li Mian is a devil. Why won't Heaven take him?” Those who love him love him fiercely, while those who hate him wish they could dig up his bones and scatter them to the winds.