Earth's Supplier for the Magical World

My name is Yan Xing, an Earthling, who can freely travel between Earth and a magical world.The elves love the silk I bring them.The beastmen are infatuated with the soap from me.The human nobles are madly chasing after the pure white porcelain.The dwarves hold the alloy they bought from me and are intoxicated by it.Even the undead want to order a set of top-grade coffins from me to show off their status.One day... angels, dragons, and demons come to me.I said to them: "My market is open to all races and creatures. You can pay with gold, or with your labor..."