Merchant From Earth in the Magical World

My name is Yan Xing, an Earthling who can freely travel between Earth and a magical world.Elves like the silk I bring them and also enjoy the longbow rockets I provide.Orcs appreciate the soap I bring them and also fancy the Roarer tanks I supply.Even human nobles, amidst their frenzy for pristine porcelain, install magnetic coils in their estates.Even the Undead hope to order a top-notch coffin set from me, to catch up on horror series during sleepless nights.One day... Angels, dragons, and demons found me.I told them, "My market is open to all races and creatures. How about a few portable Doomsday Judgments?"