Lin Mo, a doctor of materials science, woke up and found that he had become a small blacksmith during the Hongwu period. Looking at the leaky straw shed, the chipped old anvil, and the clearly visible bottom of the brown rice porridge in the pot, he sighed and started by improving a hoe. Quenching technology, blast furnace design, new steel-making methods... He thought he was just making a living, until Ying Tianfu Yin came to the door with a waist knife he forged, until the head of the Ministry of Works squatted in his blacksmith shop for three days and refused to leave, until the founding emperor of Huaiyou, who was born in civilian clothes and couldn't get rid of the sand in his eyes, summoned him to the Fengtian Palace, pointed to the drawing of the "Hongwu Type Flintlock Gun" he presented, and asked the words that changed the fate of the entire dynasty.
