Underground City Y1

"Due to the growth and expansion of the world's population, the earth has been overwhelmed. Even the most basic housing has become very rare, and the world situation is tending to collapse. In order to solve this problem, various countries have jointly established a coalition government. More than 100 plans were discussed, but in the end only China's 'underground city plan' was approved. The plan was finally adopted There was a craze for building underground cities all over the world. However, a tragedy occurred. A monster called the 'Disaster Mutant' suddenly appeared and caught mankind by surprise. People underground remained underground forever, and people on the ground could never go underground. The underground cities gradually lost their popularity over time, leaving only desperate people..." This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.