I have a through door

Introduction: Qin Feng, a mediocre loser, was just fired from his company, but was betrayed by his girlfriend. Under the double blow, Qin Feng couldn't help but feel a little discouraged. At this time, Qin Feng accidentally obtained a portal that could travel to the end of the world. A pound of potatoes can be exchanged for a pound of gold, and a steamed bun can be exchanged for the devotion of a top-notch beauty. . . . . The introduction is a bit pale, please move to the main text.