Bang!
The thick door made of unknown alloys closed behind him. The room Chu Nan entered immediately turned into a completely sealed space without any gaps.
There was no obvious light source in the room, but the entire room was lit in all directions with a warm light that was not especially bright, but it was not weak. It could completely illuminate the entire room, causing this room to be not much different from the outside world from the light alone.
Chu Nan glanced around and discovered that this room was actually not small. It was ten meters long and eight meters wide. The top floor was more than three meters tall, so it did not feel too oppressive inside.
Moreover, although the room was completely sealed on all sides, he felt that the air was very fresh and clean without any turbidity.