Actually, there is no need for Ye Zhanjian to say it, everyone thinks this place is very weird. The unbelievable underworld is home to mushrooms, ferns, and worms that don't exist on the ground, as well as countless mutated monsters and birds. These organisms also form a simple ecological chain.

What's even stranger is that in this underground world, there is a huge cylindrical building full of technology.

The first thing that comes to anyone's mind when they see these factors is that some technologically advanced organization is conducting evil scientific experiments.

However, until now, they had not even seen a living person panting.

Could it be that this underground world is actually a base that some evil organization has abandoned?

It really doesn't make sense. What kind of high technology can allow an ecosystem to operate unattended for hundreds of years?

Not so when the old era technology was at its most advanced.

Everyone exchanged glances with each other, and then they all looked at Wang Xiaotian.

Wang Xiaotian said in surprise: "Why are you looking at me?"

Ye Jian said: "Because, what you said before is very reasonable. So, I'd like to hear your opinion this time. Where do you say?"

Wang Xiaotian thought for a while and said, "Have you noticed the passage you came over just now?" ”

Dugu Yingzi was the most anxious and asked, "What's wrong with the passage?"

Wang Xiaotian said: "The walls and doors of that passage are obviously not prepared in advance. ”

Everyone looked at Wang Xiaotian in confusion, and couldn't figure out what he meant.

Wang Xiaotian pointed to the current passage and said, "Look, this is a normal passage. Spacious, straight and with lighting on the walls. The passage we walked through just now was obviously different from this one. ”

The crowd nodded. The passage just now is indeed very narrow and tortuous, and there is no lighting inside, which is different from the current passage style.

Wang Xiaotian continued: "This shows that the passage was not originally designed to be used as a passage. It's likely just an emergency exit, or simply a repair route. ”

The others still looked at Wang Xiaotian in confusion. Ye Jianjian nodded thoughtfully.

Wang Xiaotian continued: "That passage is not an exit, but it is used as an exit, which means that the normal exit can no longer be used. Judging by the location of this thing outside, the exit is likely to be in the part that is inserted into the ground. ”

The crowd nodded. Still, they are confused.

Tuoba Qing said puzzledly: "The exit is underground, what will happen?"

Wang Xiaotian said: "Just like the steam truck we sit in, the workshop is generally placed very close to the exit, so that it is convenient for the occupants to enter and exit." So, if you want to solve the mystery, you have to find the workshop of this thing, and the workshop should go down. ”

Ye Jianjian slapped his face and said, "What Xiao Tian said is right. That's what I thought, too. What do you think?"

The others thought for a moment and nodded.

After determining the direction, the group continued to walk forward, and after walking a short distance, they found a new problem, there were two forks in the road, one on the left and one on the left.

Standing in front of the fork in the road, everyone looked left and right, and found that the structure on both sides was exactly the same, which way to go?

Everyone made a difficulty, and then after exchanging glances, they looked at Wang Xiaotian again.

Wang Xiaotian shrugged his shoulders and said, "Don't look at me, I'm not an immortal, I don't know which way to go." ”

Ye Jianjian thought for a while and said, "Let's divide the soldiers into two ways." How do you choose?"

Tuoba Qing and Dugu Ying also glanced at each other, and then Tuoba Qing said, "Let's go to the left." ”

Ye Zhanjian nodded and said, "Xiao Tian and I will go to the right." What about the two of you?"

Ding Sicong and Lieutenant Colonel Lu exchanged glances, and then the two turned their gazes to Wang Xiaotian again.

Seeing this, Wang Xiaotian said to the two: "If you are willing to go with us, you can do it." However, I can't guarantee that I made the right choice. ”

Tuoba Qing and Dugu Ying glanced at each other, and hurriedly said at the same time: "Since the two of them are going with you, then we will go with you too." ”

Wang Xiaotian nodded helplessly.

Originally, if they had acted separately, the exploration efficiency would have been at least doubled. But now that they had to act together, it took twice as long.

However, it is good to act together and take care of each other.

The crowd turned into a passage, and soon found two more forks, but they were distributed up and down, one up and one down.

The crowd chose a downward fork and turned around, and after walking for long, they found two up and down forks again.

The crowd chose an upward fork, and when they walked up, they soon found a horizontal fork. Moreover, the layout on both sides of the fork is exactly the same!

The people again stood in front of the two forks in the road, and made a difficulty.

Tuoba Qing scratched his head and said, "What do I think, I came here just now." ”

Ding Sicong rolled his eyes and said, "These forks are all the same, who knows if they have been walked through once?"

Ye Jianjian thought for a while, took out his sword, carved a trace on the wall of the fork on the left, and said, "Make a mark first." Dugu Eagle, you carve a two on the other side. ”

Dugu Ying carved a mark on the wall of the fork on the right, and the group entered the fork of the road with one carved first.

Then, every time they encountered a new fork, they carved one on the left and two on the right. If it is an upper and lower fork, go to the lower one and the upper one.

In this way, as they walked, they marked the forks, and each time they chose the ones that were engraved with one. They walked for a long time, and finally came out of the fork in the road engraved with the two symbols.

When everyone saw the two symbols on the wall of the fork, they all sat on the ground in frustration and began to spit fragrant fragrance.

Wang Xiaotian did not speak. He carefully recalled the shape of the symbols each time, confirming that they had carved the symbols twelve times.

Twelve two-dollar choices, but in the end, they returned to a place they had walked before. This is clearly problematic. Because, although each horizontal fork is straight in the direction and the corners are all ninety degrees at right angles, since they choose the left fork each time, it forms a three-hundred-and-sixty-degree cycle that requires four left turns.

However, when they choose to go up and down the fork, they uniformly choose to go down. If you choose every floor, how can you go back to your old place!?

That is, they have been reversed vertically at least twice more than twice without them noticing!

Wang Xiaotian immediately told everyone about this discovery.

Everyone had long known that something was wrong, but they were still taken aback when they heard Wang Xiaotian's analysis. Then, a thought popped up in everyone's minds, "Is there a ghost here?"

Immediately, they felt a chill on their backs.

When Wang Xiaotian saw their strange reactions, he immediately said, "What are you thinking? Why are they so strange?"

Sergeant Lu said, "Xiaotian, don't you think there's something wrong with this?"

Wang Xiaotian said: "What's wrong? If our orientation is deliberately reversed, it means that we have found the key." The enemy should be well aware of this, and besides, it can't stop us forcibly, which is why it traps us in this way. ”

Ye Zhanjian nodded and said, "What Xiao Tian said is right. If the enemy is strong enough, there is no need to play this trick by other means. ”

Ding Sicong said: "Then what should we do next?"

Wang Xiaotian said: "Draw a map." There were six of us, and one person was responsible for measuring distances and drawing graphs. The other five people stood one at each intersection. After drawing an intersection, the person who is at the first intersection will go to the sixth intersection. And so on, I don't believe I can't find the clues. ”

Everyone nodded in agreement, and immediately divided the order. As for the work of measuring and drawing graphics, it was handed over to Wang Xiaotian.

Wang Xiaotian took a pen and paper and began to draw a map according to the number of steps.

However, after tossing for a long time, Wang Xiaotian found that the paper was already full of paths, and the maze had at least four layers, but it did not coincide with the original place at all.

This place can't be infinite. That is to say, in the place where they left after drawing, the passages and paths have changed in a new way, and they certainly cannot draw a real map.

The crowd sat at a new intersection with their heads down.

Wang Xiaotian said with a guilty face: "I'm sorry, I'm too stupid to find a solution." ”

Ye Zhanjian waved his hand and said, "How can I blame you for this?" Rest for a while, and when we have the spirit, we will find a way out." ”

Everyone tossed for a long time, and they were all tired, so they unfolded their sleeping bags and took turns to rest.

Wang Xiaotian couldn't sleep. He kept thinking about the labyrinth. However, he couldn't figure out what was going on. After thinking about it for a long time, his spirit was very tired and he fell asleep in a daze.

When Wang Xiaotian woke up in his sleep, he found that everyone else was gone!

Not only were the people gone, but even the sleeping bags and other items had disappeared without a trace, as if no one else had ever appeared.

What surprised him even more was that in the middle of the two forks in the road, a door appeared!

It's a closed door, but it's definitely a door, not a wall or something. Because it has a door frame and two doors, there is also a noticeable gap between the two doors.

Wang Xiaotian stood up cautiously, and then walked cautiously to the door, for fear that if he was not careful, it would disappear.

When he walked to the door, he slowly stretched out his hand, quietly approached the door, and then gently touched the door with his fingertips.

The cold metal touch told Wang Xiaotian that this was not a dream.

First the fingertips, then the fingers, and finally the entire palm. Wang Xiaotian touched the door and didn't find any protrusions. The bond between the door frame and the door is so tight that there is no gap.

There was a gap between the two doors, but it was so thin that even a hair couldn't get through.

Wang Xiaotian didn't give up, and pressed the door hard.

Suddenly, there was a "squeak", and the door suddenly opened from the middle to both sides, and the lights inside also turned on in turn, illuminating the space inside.

Wang Xiaotian saw that it was empty, only a spiraling down staircase.

He hesitated, curiosity overriding fear, and slowly walked into the room, then down the stairs.

His shadow had just disappeared from the ground when the door slammed shut.

When Wang Xiaotian heard the sound of the door closing, his heart suddenly shook. However, he did not turn back, banging on the door desperately, calling for help outside. Instead, he settled down and continued to walk.

For him, finding out the truth about the underworld is even more worth the risk.

The spiral staircase is closed and seems to have no end. The light in the staircase was also slowly fading, and in the end it could only illuminate a small part of the road in front of you.

I don't know how many stairs I walked, and finally Wang Xiaotian finally stepped on the flat ground.

It was a flat dirt passage.

This also indirectly verified Wang Xiaotian's guess that the outlet of the big metal cylinder was underground. But why is the exit a spiral staircase? And it's still so long, it's already tens of meters underground.

Wang Xiaotian couldn't guess the answers to these questions.

He continued to walk forward, walked for about ten minutes, and then he saw something that made his three views collapse and unbelievable.

A huge brain!

It was like a hill, lying in front of Wang Xiaotian, every fold, every ravine, and even every blood vessel in the ravine, could be seen clearly.

"Please come here. ”

A voice suddenly sounded in Wang Xiaotian's mind. He was stunned for a moment, and immediately looked at the behemoth in front of him in horror.

"Don't be afraid. Please come to the front. ”

Wang Xiaotian hesitated for a moment and slowly stepped forward.

Then he saw that there was a row of things on the edge of the hill-like behemoth.

When he looked closely, it turned out to be something like blood vessels sticking out of the giant brain, woven into something like a rattan chair.

Ye Jianjian, Ding Sicong and the five of them were all sitting on the "rattan chair", with an arc-shaped thing like a hat, a blood vessel-like thing buttoned above their heads, which was connected to the brain from the hat.

Wang Xiaotian saw it and couldn't help but think in his heart: "What is this?"