After Rebirth, I Built Illegal Buildings in Another World

Lin Jian, in his previous life, was a graduate student in the Department of Civil Engineering + an amateur tower defense game master. He suddenly died while working overtime and traveled to a desert village in a different world. Just woke up, the system is activated: [The illegal construction master system has been bound] System prompt: [Warning: A wave of level 1 monsters will attack in 3 days] Looking at the dilapidated house in front of me × 10, 50 villagers (half are old, weak, sick and disabled), 5 broken knives as weapons... Lin Jian: "System, are you kidding me?!" But now that it's here, let's do it! Use modern construction knowledge to defeat craftsmen from other worlds, use tower defense game experience to teach monsters how to behave, and use project management skills to develop small villages into floating divine cities! Monster: "How can this human tower still rotate?!" Noble: "You are building illegally!" Protagonist: "Sorry, this is called technological innovation." While other lords were still worrying about the thickness of the city wall, Lin Jian's floating city was already hanging above the monster's lair. While other brave men were still practicing their sword skills hard, Lin Jian's automatic arrow tower had already achieved full coverage of the fire network. While other time-travelers were still pretending to be cool, Lin Jian was already studying "how to persist in building a toilet amidst the tide of monsters." This is a story about an obsessive-compulsive lord who builds infrastructure in another world. This is a story about illegal construction and beating up regular soldiers. This is a story about a monster who is so angry with humans that they doubt the existence of demons.