Turning Swords into Plowshares: I Build City-States in Ancient Times

Protagonist: Lin He, 28, a modern civil engineer with a practical, rational personality

System: Myriad Realms Infrastructure-Building System, using a tech-tree model with features unlocked through achievements

Transmigration destination: The final years of the Great Yan Dynasty, a fictional ancient era divided among rival warlords

Central conflict: The collision between modern thinking and ancient society, and the struggle to balance survival in a chaotic age with the ideal of building a better world