Weapons Manufacturer of the Immortal Realm

After an ancient war, the gods fell silent. Chen Tian, a young man, was reincarnated from the underworld into a cultivation world. All he wanted was to cultivate in peace and live forever. Who could have guessed that he would sense the world's deep hostility and find himself trapped in a small place? No matter. I'll build things up slowly. First, I'll tinker with some everyday products and trade them for cultivation resources. When war breaks out, I'll sell weapons. He only meant to support his family. Somehow, his business kept growing until he gradually became the largest supplier of goods across the Myriad Worlds.