So the man in black and Guodong led the way in front, and Liu Yu followed behind with Tang Ze Keiko on his back.

At this time, they attracted a lot of attention along the way, and they walked directly from one building to the other, and then walked directly through again.

These buildings are connected by a sky corridor in the middle, and Liu Yu went directly through 3 or 4 buildings, and then came to the last building, and then they sat in the elevator.

"What's the situation? Is that madman doctor locked up so tightly? Where are we going? ”

Liu Yu asked suspiciously at the face of the man in black at this time, and the man in black pointed to the ground and said mysteriously to Liu Yu's face at this time.

"He must be locked up in the safest place, because such a person is actually a madman and a genius, and if someone from another organization, such as the Shadow of Darkness, captures him, then maybe it will be used by them, and if this mad doctor suddenly comes up with a good idea, then the situation will be much more troublesome."

Hearing the man in black say this, Liu Yu smiled and nodded, because the actual situation was exactly like this.

Needless to say, the madman must have been very powerful when he had a good brain, so the few of them slowly went underground.

Finally, the elevator clanged and stopped there, and it didn't show how many floors were underground.

Liu Yu guessed in his heart at this time that he should have reached the distance of the 3rd floor underground, because just now he had been calculating the time distance from the ground, but as soon as the door opened, he was completely stunned.

Because Liu Yu found that there was actually a karst cave underground, and there were some dark rivers in front of it.

This means that it must be at least a dozen meters underground.

No, it is sometimes difficult to see the underground dark river for more than ten meters, unless it is at a distance of twenty or thirty meters, because Liu Yu also knew a little bit about the terrain here.

Liu Yu is a little confused now, why is it different from what he imagined?

At this time, he turned his head to the man in black and asked Guodong, "We are now on several floors underground, how did we end up in a cave?"

And it's not like a corridor or something, can there be that mad doctor hidden here? This place is not a place for people to stay at all, how humid it is, if people stay here, can they still live? ”

The man in black laughed at this time, and then said to Liu Yu.

"Brother, you're thinking too much, the madman must be here, this is a natural cave, very safe, in fact, we have now gone down to a distance of 38 meters underground."

"What? We're 38 meters underground? ”

Liu Yu's eyes gradually widened at this time, revealing a look of disbelief, how could this be?

I feel that the distance is only three floors at most, why does the elevator take them to such a deep distance underground?

At this time, seeing Liu Yu's puzzled and confused expression, the man in black and Guo Dong burst out laughing.

"Hahaha, that's so interesting, Brother Liu Yu."

Guo Dong interjected to Liu Yu at this time.

"Actually, I was a little confused when I first came over, and the brothers in black are like this, but you can get used to it."

At this time, Guodong turned around and said to the elevator.

"This elevator is very ordinary, but you have to know that there is a problem with the magnetic field in this underground, so everything is amazing, and it is different from your original perception.

And you now look at this cave is straight, in fact it is curved, and it is still extending downward.

Go, I'll take you. ”

Guo Dong waved his hand at Liu Yu proudly at this time, and now he felt very happy in his heart, because Liu Yu seemed to be being tricked.

To be honest, Guo Dong was also very puzzled when he was here with the man in black before, but gradually he really got used to it.

They deliberately didn't tell Liu Yu about the specific situation here at that time, because they wanted to make Liu Yu stunned once.

Is this really the case?

Liu Yu diffused his aura at this time, but he tried to open his aura at this time and investigate the situation of this underground cave, but he was stunned for a moment.

The walls of the cave actually reflected his aura, and he reluctantly put away his aura.

At this time, the man in black who felt Liu Yu's aura overflowing, turned his head to Liu Yu and said, "Brother, don't waste your efforts. ”

Then he pointed to the rock walls of the whitening caves, and said to Liu Yu, "There are some rare metals on them, and there is also a spiritual aura here, so it is also a spiritual vein."

Your aura is really hard to use here, and mine is not easy to use. ”

Saying that, the man in black pointed to this Guodong again, and then said to Liu Yu, "Guodong is not suitable, almost all people are not good, but there is only one person, his aura is good." ”

Liu Yu's eyes widened in astonishment for a moment when he heard this, and he put Tang Ze Keiko, who had already slipped down on his back, and put it on it again.

Then with a look of astonishment, he said to the man in black, "Could it be that you are talking about that mad doctor, how is it possible?" Why is he so? ”

The man in black snapped his fingers at Liu Yu at this time, and then said to him.

"I won't lie to you, you will know when you see that mad doctor, really, that mad doctor is very strange, and his aura will be good for a while, and his brain will be good for a while, so you have to be very careful when you see him."

Hearing the man in black's request, Liu Yu showed a serious expression on his face at this time.

Because his golden finger mainly relies on his own aura, but now in this underground cave, the aura is also a little bad.

So what if that mad doctor spills, or if something unexpected happens here?

Liu Yu was thinking about it in his heart, but gradually he heard a strange sound in the distance, and then he found that the man in black and Guo Dong's face also tightened.

"Did you hear the movement ahead? What is that? ”

Liu Yu's aura can't be dispersed now, so his hearing has also been lost in half, and the man in black glanced at Guo Dong at this time, and then said with a look of surprise.

"Oh no, no, someone ran out, isn't that mad doctor?"

In an instant, Liu Yu's eyes widened.

Then the voices on the other side became louder and louder, and then the three of them saw several figures over there.

It turned out that the sound I had just heard was the sound of footsteps.

Then someone shouted, "Oh no, no, no, Doctor Mad ran away, this psycho ran away, hurry up and catch him!" ”