Datang: Start by Planting Potatoes

Zhao Yin traveled back in time to the Zhenguan period of the Tang Dynasty with a mysterious system. Through people's admiration value and shock value, he exchanged many things that were not available in this era within the system, and accidentally reached the pinnacle of life. Li Er: "I guess the output value of your land per acre is only four hundred catties at most." Zhao Yin: "If it reaches three thousand catties, you will marry Princess Changle to me." From then on, Li Er had a son-in-law...