The Imaginary Warring States Period: from a Sinner to the Master of the World's Soldiers

Li Shen, a modern special equipment engineer, traveled through time and became a criminal who was about to be executed in the fictional Warring States Period. Relying on his mechanical manufacturing, engineering management and battlefield transformation abilities, he started by repairing a broken crossbow, established a workshop, transformed the army, defeated the princes, and finally changed the world with technology and systems.