When Lin Xun stood on the top floor of Noah's Ark, looking at the orderly people living inside and the ruins of zombies outside, he suddenly understood: the most terrifying thing about the doomsday is never the zombies, but the loss of control over resources and order. The system is a tool, and the building is a carrier, but what really allows civilization to continue is the ability to integrate resources and unite people in desperate situations. As long as the lights of Noah's Ark are still on, the fire of mankind will never go out.