Lin Wan, a scientific research elite, accidentally transformed into the "prodigal son" of the Tang Dynasty and launched a scientific revolution in Chang'an City. From making soap, burning glass, smelting steel to improving the curved shaft plow, he subverted agriculture, industry and commerce and made craftsmen his guests. Faced with pressure from the powerful, he built roads with cement and made artillery. When the Turkic cavalry pressed against the border, the Tang Dynasty's elite equipment "Lin's Repeating Crossbow" won the battle thousands of miles away. The emperor sighed: "This is the most hard-core rebirth."
