It's training

Gen then said, "Well, it's kind of complicated to explain. Come with me and I'll explain about this place.", and then everyone started to follow Gen.

He then went towards the wall with the markings and opened the passage in it. Everyone was surprised to see this, and Raja said, "Don't be surprised now, you haven't seen anything yet.", and then Gen went towards the control room, passing all the other rooms on the way.

When they got to the control room, Zoe said, "What is this place? It's huge, and there are so many things. The bathroom looks huge. The training room too, and there are games here too."

And Raja said, "I told you not to be surprised, hahaha."

Gen then went towards the center of the room and made more chairs appear around the table with the map, so that everyone could sit down.

He then sat down on one of the chairs, and said, "Sit down."