Double Doors: My Backyard Leads to the Interstellar Space

When Lin Feng returned to his old house, he unexpectedly discovered that there was a double door behind his old house. The other side of the double door connects countless parallel universes! Traveling to the wasteland world, a glass of water was exchanged for a genetic potion! Traveling to a world where he mastered atomic synthesis technology, he exchanged gold synthesis technology for a cabbage price. 3Nm lithography machine, floating vehicle, ultra-distance wireless power transmission... As Lin Feng gained more and more things from the double door, everyone was surprised to find that this man from China had become the richest man in the world! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.