Qin Lie, an engineer in a modern military factory, traveled to another world and became a handyman in a blacksmith shop in a border town. War breaks out frequently in this world, iron smelting is lagging behind, and cold weapons are king. He awakens the "Eye of Technology", which can analyze the structure of all things and reverse engineer the earth's technology. Starting from a scrap iron forged steel crossbow, Orion tried shooting through three wooden boards. When he first became famous, he was blackmailed and suppressed by local snakes. Lack of food and resources, isolated and helpless, with only a pair of hands and knowledge in the brain, igniting industrial fire beside the furnace. The age of cold weapons is about to be shattered, and a revolution driven by steel, gunpowder and steam has quietly begun.
