It's only an illusion

In a place three thousand meters below Wanghai city, an odd-shaped fallout shelter was buried.

The reason why it was odd was that there was no living area, nor ventilation equipment. Only the mechanical parts that sparkled occasionally and the light that came on and off.

And because of this, in the surrounding five hundred square meters, it was filled with ozone.

Along the outskirts of the room was a ring of hibernation chamber devices. However, a closer examination would indicate that it was not a traditional hibernation chamber because there was no sign of ice shards on the glass surface. Inside the chamber was not ultra-low temperature, but inert gas. It was obviously not preserving humans, but robots.