Restarting the Apocalypse, My Refuge Connects All Worlds

The cosmic gamma ray burst is coming, the genes of global species have collapsed, order has been reduced to wasteland, and 99% of human beings have been alienated into "deviants"! In his last life, Lin Fan was betrayed by his school beauty girlfriend and his best brother, who he saved with his life, and was pushed into a monster's lair, leaving no trace of his body. Once he was reborn and returned to three months before the end of the world, he actually activated the [Dimensional Exchange] that can connect all heavens and worlds! Bite! Trade a ton of ordinary iron ore and get: T-800 combat robot x 1! [Ding! Trade ten liters of pure water and get: Eternal Energy Core Design Map! When countless survivors fought desperately for a can of expired cans, Lin Fan exchanged a bag of rice for [high-dimensional soil] that can grow any crop! While the major forces were still building defense lines with flesh and blood, he used several trucks of scrap copper and iron in exchange for alien alloys to build an [Ecological Dome Fortress] with technology crushing the times! The end is coming, and everyone is wailing in despair amid radiation and hunger. Lin Fan's fortress was as warm as spring, and the robot butler served freshly baked barbecue. School belle in previous life: Lin Fan, I know I was wrong. As long as you let me in, I will do anything for you! Former brothers: Brother Fan! We are brothers! You can't be so selfish, open the door quickly and let us take refuge! Military strongman: Lin Fan! Hand over your technology and supplies immediately, this is for the continuation of all mankind! Looking at the familiar yet ugly faces on the surveillance camera, Lin Fan lay on the soft bed and smiled scornfully. "For all mankind? In the last life, which one of you did it for me? Even the electronic pets you raised are more valuable than you!