Apocalyptic Glacier: I Use the Red Alert System to Build Infrastructure

[Red Alert] [No explosion] [Infrastructure] [Superpower] [Fight monsters] [The male protagonist is wilted and broken] [No female protagonist] Jiang Haochen, who had survived for three years in the apocalypse, was stabbed in the back by his companions and was about to be swallowed by an S-class beast. He returned to before the apocalypse! Given another chance, why would he create a different ending! [Bite! Welcome to the Red Alert System! ] At this moment, the gears of fate begin to turn! Walls, anti-aircraft guns, and sentry guns formed a steel fortress. Light prism tower, magnetic storm coil, and giant cannon create the ultimate weapon. Mobilized soldiers, heavily armed soldiers, rocket pilots, the red police force is vast. Apocalypse tanks, light prism tanks, and Kirov airships swept across the world. There are also iron curtain devices, weather controllers, and time and space teleporters! "What? You have a power plant in your base?" "I heard he has ten tank regiments!" "Mom, look! There's an airship in the sky!"