Traveling through the apocalypse, Lin Wan bound the city-state sign-in system! Sign in every day to draw various buildings, upgrade and unlock massive benefits. Build a stronghold on the ruins, defend the enemy with defense towers, rescue people at the medical station, and build a doomsday refuge city-state step by step. A cold and fierce combat boss, a gentle and gentle genius doctor, and a sinister and wanted intelligence boss came one after another. She is madly complaining on the inside, but calm and in charge on the outside. Watch her hold the infrastructure in hand and carve out a world of survival in troubled times!