World Submerged: I Built a City

When the world is swallowed by floodwaters and humanity teeters on the edge of extinction, Hu You finds himself left behind to perish. Yet fate gives him a second chance: he is reborn just before the catastrophe hits, with knowledge of what is coming. The rebirth forces him to rethink everything he thought he knew about survival, and the drowning world offers little room for hesitation.