However, Lu Yuan waved his hand slightly: "No, we'll never finish pumping water. This place is so big, let's go in and take a look first. By the way, take the submarine and circle around the top of this building to see how big it really is."
Chen Han could only nod, and then he slowly drove the submarine forward. After traveling about one kilometer, the road ahead suddenly came to an abrupt end.
Then Lu Yuan asked him to drive on both the left and right sides to explore the area. After that, Lu Yuan finally learned that the underwater structure was about one kilometer long and about fifty meters wide.
This is a long, narrow building, about 200 meters high.
"If this place is a prison, then there must be a lot of people imprisoned here. But how long have the people from above been gone? Will they all die here? Are these people still of any use to us?"
Zhou Tong, who was sitting to the side, suddenly said: "I think it's necessary to rescue these people, because they might know how to open the roof. Once we find them, we can leave this underground fortress as soon as possible."
Lu Yuan nodded: "Alright, let's see where we can get in. I'll go first!"
After speaking, Lu Yuan took out a diving suit made of a new type of silk fabric from his dimensional space. This diving suit was originally designed for deep-sea diving.
It uses inflatable equipment near its chest cavity, and the oxygen tank behind it can carry about three times more oxygen than before, enough for a person to stay underwater for a long time.
Seeing Lu Yuan seemingly perform a magic trick and produce another large amount of equipment, Chen Han showed a look of shock. Then Lu Yuan handed a diving suit to her, and Chen Han showed a look of shock again.
"Should I go too?"
Lu Yuan looked at the other person: "What do you think?"
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