Extreme Cold Disaster: My Apocalyptic Base Can Be Upgraded

Also known as: Rebirth of the Technological Continent, encountering the extreme cold of the apocalypse. After being reborn and returning to the 30 days before the extreme cold apocalypse, the first thing Chen Nuo did was not stock up on goods. He anonymously published the coordinates of all official shelters across the country and apocalyptic survival guides. When a blizzard of minus 70 degrees flooded the city, he took supplies and hid in a mountain cave with female doctor Ye Yuwei, but unexpectedly discovered an arsenal left by the military. What's even more shocking is that there is a mysterious altar deep in the cave that can transform any item. While other survivors were killing each other for a piece of chocolate, Chen Nuo had built a doomsday fortress with a constant temperature of 25 degrees. Until he found a line of small words on the altar: "Civilization Upgrade Trial Ground, current progress is 1.7%"...