For example, if you want to have an empty room, you need at least two load-bearing walls, and if you need to take the elevator, you have to open a vertical elevator shaft from the top floor to the ground floor. The longer the corridor, the more it needs to be fixed with horizontal steel bars, and an external guard must be added to the light and thin wall.

99% of the buildings are in this way, because if they don't, then the building is not strong, even if the so-called 'modern shape' of the building is very chic, it is the same inside, but it is just a skin with bells and whistles.

And this kind of architectural model also leads to the fact that as long as you know the structure of the first floor, it is very convenient to infer the general style of the entire floor.

Lu Yuan is now in such a state of 'having a complete map in his head', so he is moving forward very quickly.

Of course, his advance is not the way he runs around in the hallway, but the way he goes down vertically, and the specific operation is that he hides in the toilet, then puts his hand on the floor, uses the skill of 'pulling', pulls a hole in the floor, then jumps down, and then continues to make a hole in the floor.

Because the sewer of the toilet cannot be turned around in the building, it is mostly vertically up and down, in other words, the bottom of the toilet is most likely also a toilet.

And the Ark Group is not mad enough to install monitors in the toilets. This led to Lu Yuan being able to dig a hole with peace of mind.

In just two minutes, he dug down four floors. At this time, above his head, a large number of soldiers had already assembled, and they all rushed to the square to fight the apostles.

In the headset, the Prophet's command continued.

"Continue to the next ......"

"One level ......"

"After 10 seconds, a person will go into the toilet and you'd better fill the hole in the top of your head...... By the way, let that guy sleep. ”

"No one will come on the next three floors, you can rest first......"

The prophet's tone was very relaxed, after all, he had the ability to predict, under his command, Lu Yuan had already descended to the 13th floor underground, dozens of meters above his head, and he didn't know what the battle was like, how long could those few people borrowed from the Foundation hold out in the face of the firepower of the Ark Self-Defense Force, and how far away they were from the mysterious [Ark Host].

Lu Yuan couldn't think about these problems anymore, he could only continue to make a desperate bet.

"Next ......"

"Next ......"

In the headphones, the prophet's voice became smaller and weaker, and it became more and more blurred, and Lu Yuan knew that he was too far away from the ground, and the signal would eventually be cut off.

"How deep is this underground?" Lu Yuan thought very depressedly, and his colleague also jumped off another floor.

"What's next? ...... Prophet? Feed?!! ”

There was only a chaotic rustle in the headphones.

Lu Yuan sighed, took off the earphones, and stuffed them into his pocket.

The next road is on your own.

Lu Yuan continued to go down, in such a deep underground, the chance of the pursuers rushing over was already very small, and after going down a few more floors, Lu Yuan finally discovered something...... That is, I seem to be in the end.

At least further down, there would be no toilets, because when he dug a two-meter-deep hole in the ground, he found that it was already full of rocks underneath.

Now, he was already about 100 meters underground, Lu Yuan pushed open the door of the toilet, and found that outside the door was a corridor, similar to the plane map in his mind, it seemed that each layer of the ark was almost carved out of a mold.

The lights are still bright, but I don't know if it's too deep, or if the Ark Group started to shut down a few months ago, resulting in no employees here, and there seems to be no one on this floor anyway.

Even, Lu Yuan walked for a while and found that there was not even a surveillance camera here.

In this case, Lu Yuan summed up two possibilities.

First, the Ark Group didn't believe that an intruder could reach such a deep place.

Second, the Ark Group doesn't want this level to be seen, so there can't be footage or any monitors.

No matter which one it is, it is beneficial to Lu Yuan.

So, Lu Yuan began to walk around on this floor, in such a quiet situation, it should be impossible to have a situation of 'suddenly rushing out a large army of dozens of people', and if it was just a few sporadic people, Lu Yuan believed that he would definitely be able to solve it.

Let's go, let's go.

About 5 or 6 minutes later, Lu Yuan came to a very spacious passage, he walked along the passage, and at the end, he saw a huge iron gate that was obviously different.

This iron door is very sturdy at first glance, and it belongs to the type that will never be opened without the right way.

And Lu Yuan was not afraid of this type of door, he walked over, put his hand on the door, and quickly made a hole. Then he walked in.

And as soon as he entered the door, he was stunned.

He saw a platform, and a railroad.

Yes, it's a railway, more than a hundred meters underground, a railway is straight in front of Lu Yuan, and the tunnel of the black hole doesn't know where it leads.

Lu Yuan took a deep breath and jumped off the platform.

He didn't expect that he would be able to directly find the location of the main body of the Ark, after all, the area of the Ark Group was very huge, and geographically speaking, he still needed to walk more than ten kilometers inside to reach the center of the Ark complex.

His original plan was to go to the bottom of the nearest building first, and try to see if the underground part of the Ark Group was connected, if so, it would be best, if not, then he would first touch in a general direction, and if he couldn't touch it, he would go up to find a signal, let the prophet help him eliminate options, and then continue to touch.

Fortunately, luck was finally on Lu Yuan's side this time, he found a railway in such a deep place, and this railway, nine times out of ten, could take him to where he should go.

So Lu Yuan began to run along the railway......

He ran fast, and here he didn't need to worry about pursuers, his feet stomped heavily and densely on the pitch-black road, and the tunnels were full of roars.

Touching like this, he ran for half an hour. In terms of speed, he ran at least half the distance of the city.

Finally, far away, Lu Yuan saw a small bright spot, which should be the end of the tunnel.

(I'm about to take the exam.,I feel like updating every day is coping with things.,But it's going to end soon.,I always want to finish it quickly.,The contradiction is dead.。

This process must be awkward for everyone to read.,So you can wait until the end to make up for the end.,Of course,If you can endure this slow and leisurely update.,I won't stop it.,I can only say thank you.。

As for the new book...... I'm working on it, and it's going to be an amazing book because it has an outline.

Finally, I wish I a good pass!!!! ）