The Tang Dynasty's Rebel Prince: From the Start, I Shocked Li Shimin

Murong Chengyan, a modern PhD in agricultural science, wakes up in the Tang Dynasty during the Zhenguan era as the son of a disgraced official. His family has nothing, and they can barely feed themselves. With a great famine looming, he looks at the “poisonous plants” covering the hills behind his home and smiles. Starting with potatoes that end the famine, he takes on the great clans, develops agriculture, opens up trade, and strengthens the military. When his arrival changes the entire Tang Dynasty, Li Shimin studies the map and falls into thought. “Chengyan, you say the Earth is round. Does that mean our Tang fleet can attack from the other side?”