Rat Woman

Once the underground world is successfully constructed, it will also become a gathering place for rich people to have fun. This means that the slums above will be overthrown and hundreds of thousands of poor people will be homeless. Some people are envious and others are jealous. These are just a way for capitalism to make money. They are essentially meaningless. So when the underground world was about to be completed, someone dropped a gas bomb into it. The ventilation vents hundreds of meters above were blocked, and thousands of people died overnight. After that, the underground world became a famous ghost city. Private capital was no longer willing to bear the huge cost of restoration, so it was abandoned.