The End of the World: Start Building the City by Strengthening the Walls

On the tenth day of the zombie outbreak, while others were hiding in the basement, eating moldy bread and crying for a way out, Lu Chen had already welded the third steel explosion-proof door to his shelter. No system, no golden fingers, no Virgin, no harem emotional lines. As a construction project leader, he only counts costs and benefits in the apocalypse, and only accepts teammates with one skill: retired security guards who know how to deploy, agricultural technicians who know how to breed, doctors who can perform surgeries, mechanics who are proficient in mechanical maintenance... Idle people will not stop crying until their throats are broken. From a temporary shelter for a single person, to a small settlement with self-sufficient water and food, to a regional city-state with a complete industrial and agricultural production chain, relying on precise structural calculations, rigorous engineering logic, and a cold-blooded sense of rules, Lu Chen built the strongest security barrier in the wasteland under the double attack of corpse tides and looters. Others fight for strength and superpowers, while he fights for reinforced concrete. No matter how ferocious the tide of corpses is, it cannot break through the wall he welded; no matter how dangerous the human heart is, it cannot break the rules he has set.