Staying at the End of the World: I Built the Basement into a Paradise

At 80°C on the surface, courier Li Gou was reborn and just wanted to survive in this purgatory. Fortunately, the doomsday sign-in system is activated! Sign in for the first time and get unlimited water! While others were grabbing supplies, I silently took out online loans and transformed the basement into a steel fortress. While others were chewing tree bark, the A-grade crops I planted were already filling the warehouse, and I opened an underground breeding farm by the way. From a one-story basement to a hundred-story underground city, while the official shelter is still worrying about energy, my geothermal generator can already light up the entire city! Until one day, the satellite accidentally photographed a paradise hidden under purgatory on the surface of the earth!