Shelter in the Doomsday

When the doomsday game comes without warning, zombies scream and tear apart the civilized order, and humans are thrown into the purgatory of survival. Ordinary college student Lin Xun accidentally awakens the "territory system" and learns that the world's only SSS-level building "Noah's Ark" can be occupied by circling around - this is the only safe zone in the doomsday that can independently produce materials and resist disasters.