My Shelter Can Be Upgraded in the Doomsday

Three days before the doomsday broke out, city security engineer Lin Mo returned from rebirth. While others were busy hoarding water, grabbing food, and looking for a place to survive, he went to an abandoned subway transfer station alone. Because there is an extra shelter upgrade module in his mind. Shelter Level: 0 Current function: Rain cover Upgrade conditions: steel, energy core, structural integrity, survivor trust Without resources, the base cannot be upgraded. Without energy, lighting and water purification systems cannot operate. Without structure, blast doors cannot stop mutated creatures. Without trust, everyone will become a new enemy in the end. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.