Chen Yuan, a modern military engineer, accidentally traveled to a different world similar to the Warring States Period and became a young prince who was deposed and exiled. Martial arts are respected here, and all countries conquer. Faced with the barbarians' cavalry, the court's hidden arrows and the emperor's murderous intentions, he relied on the modern knowledge in his mind to start from a barren border town. Smelting refined steel, building artillery, training new troops, and developing commerce... He built the border town into a feared "Steel City." Let's see how the protagonist uses technology and strategy to embark on a path from prisoner to supreme hegemony in this troubled world, reshaping the civilization of an era.
