When the doomsday comes, I have a planet-level shelter. The 18-year-old male protagonist Jiang Yu accidentally obtains the doomsday system. Through the system, he builds a safe house, a safe base, and nanorobots to build a survival city in the apocalypse. It accepts the humans who survive the apocalypse, maintains the order of survival, eliminates the losses in the apocalypse, protects humans, and provides the food needed for survival.
