The Legend of the Craftsman from Another World

A legend enlightens the world, half a pot of tea tastes life. I don't know the flavor when I first read it, but after reading it I become a familiar person. "This class of apprentices is not good. After three days, few have mastered calculus. Their qualifications in weapon refining are too poor. Master should be angry again." With a curious heart, Zhang Hao used science to analyze the origin of the other world, starting from refining weapons, and became the overlord of one side. War, martial soul awakening, cosmic space, nightmare space, boundless purgatory, the driving forces behind major historical changes gradually surfaced under Zhang Hao's exploration. But the final enemy, the real terrifying existence is...