In the first year of Jingyou's reign in the Northern Song Dynasty, Yanzhou was invaded by Xixia, and the border army's armaments were depleted. The visitor from another world started as an auxiliary soldier of the border army and relied on modern skills to build weapons and defeat the enemy. He reorganized workshops, improved ordnance, and taught skills to each camp. Side by side with his companions, he used ingenuity to consolidate border defenses and stabilize territory, writing a legend of craftsmen who were loyal and brave in defending their territory.
