Modern military engineer {Lin Wan} accidentally exploded while testing gunpowder and traveled to the Tongguan battlefield in the early days of the Anshi Rebellion. At a critical moment, he was rescued by Tang Army general {Li E} and was forced to join the army. Relying on advanced military industry knowledge, Lin Wan improved the trebuchet, optimized the gunpowder formula, and built a repeating crossbow array. He repeatedly repelled the rebel attacks and formed a life-and-death friendship with Li E.
His "strange skills and obscene skills" have repeatedly accomplished extraordinary feats, but he was jealous and ostracized by the senior officials of the court. During the battle to defend Suiyang, improved firearms severely damaged the rebels, but attracted the covetousness of the Tibetan forces. When the smoke filled the air, Lin Wan assisted Guo Ziyi in quelling the rebellion. He wrote his life's core skills into "Ordnance Minutes" and hid them in the underground palace of Famen Temple. Thousands of years of war have passed, leaving only sporadic records for future generations to explore this dusty legend of the military industry of the prosperous Tang Dynasty.
