In 2025, an alien spacecraft crashed into the Earth due to insufficient energy. The antimatter storage device was damaged, forming a tiny "antimatter source" that could not be closed, and continued to slowly release antimatter. Antimatter and positive matter undergo an annihilation reaction, tearing apart space locally and forming a "space-time ulcer." The physical rules of the affected area are disordered, and humans can only survive in the "rules stable zone".
Mission: Human civilization will last forever