Standing on the observation deck and looking down, there are hundreds of meters deep below! Below the corridor is an avenue. Bounded by that avenue, on the left are rows of buildings rising from the ground.

The roof of the building, far from the observation deck where they were, was at least ten meters high. The exterior of these buildings is exactly the same, and it is impossible to distinguish them without looking at the numbers on the exterior walls.

Each building has more than 30 floors, each floor has 8 doors, and each room is about 4 meters wide and about 10 meters deep. Outside the door is a corridor about 2 meters wide, and there is an elevator at each end of the corridor, and there is a zigzag staircase next to the elevator. These staircases, mounted directly on the façade of the building, are not protected by handrails.

The distance between the front and rear buildings is more than 10 meters, and the distance between the left and right buildings is more than 5 meters, and there are 5 buildings in each horizontal row. The building closest to the observation deck is numbered 1-5 from right to left. If you look at it vertically, you can't see the edge at all when you look at it from here, so you can't count how many buildings there are.

On the right side of the corridor, there are also many buildings, but compared to the neatly arranged buildings on the left, these buildings are different, some are tall, some are small, and some have a large open space attached to them.

In the most prominent position of each building, a fluorescent sign is placed with words such as: "Restaurant, cinema, volleyball court, shop, laundry, school, villa area" and so on.

Seeing this, Wang Xiaotian felt as if he was in a huge sand table, everything was so unreal, but reason told him that all this was true.

After a while, Wang Xiaotian looked up again, and was taken aback again. It turned out that above their heads, there were countless pipes of different thicknesses, like the roots of old trees, intertwined and woven together in the slightest, forming a huge steel dome.

This steel dome is fifty or sixty meters high from them, and there are countless lighting fixtures on this steel dome, which not only illuminates the tubes, but also illuminates the buildings below as if it were daylight.

Wang Xiaotian was secretly surprised, and secretly thought in his heart, if the place where they entered the elevator was above the steel dome, the distance between them on this floor would actually be more than eighty meters. It took about 5 seconds for the elevator to start and stop, which is about the same speed as jumping straight down, so it's no wonder he felt dizzy.

After a long while, Zhou Ziheng sighed: "It's so huge down here!"

Yalan came back to his senses from surprise and said, "This should be a first-class shelter, capable of accommodating more than 100,000 people, basically a city should have all the functions here." It's a pity that the city didn't have time to open, otherwise it would ......"

Everyone sighed when they heard this.

Zhou Ziheng also sighed secretly. The inability of a shelter to shelter those in need is like a life-saving medicine that molds in a warehouse, which is the most distressing.

Although these have long been history and have happened, as a descendant, even if thousands of years later, he saw that this great project did not play its due value, and he still couldn't help but sigh.

After a while, Yalan said, "Do you want to go down and have a look?"

Zhou Ziheng said: "There are only some living facilities down here, right?"

Arlan glanced at the city below again and said, "Yes." Although there are many buildings here and they are magnificent, they are just living areas. Something of value in general, will not be placed here. ”

"What's that floor down there?"

Yalan couldn't help but glance at Master Haozhi, and then said to Zhou Ziheng: "The following should be the warehouse and production area." Sometimes, some experimental facilities are also placed there. ”

Zhou Ziheng's eyes stared at Yalan like electricity, "Is this shelter only three floors?"

Yalan looked a little nervous, "This...... It's hard to say, there are only three floors from the elevator. But...... Sometimes, some core areas may not be directly accessible by elevator. ”

Zhou Ziheng said slowly, "You have more experience than us in exploring the shelter. This is our first collaboration and a learning experience from you. I hope you don't hide your secrets and show sincerity. ”

Yalan didn't speak, and Master Obscure said: "That's your Excellency, judging from the shelters we have opened in the past, the structure and function of each shelter are different. ”

"We're just, based on past experience, we don't dare to pack tickets for some things. When communicating with you, I was afraid that I would mislead you by saying something wrong, so I was under great mental pressure and a little nervous, so I didn't hide your intentions. ”

Arlan nodded repeatedly, "Yes, yes." Thank you for your understanding. ”

Zhou Ziheng's expression was slightly dark, "That's the best." Let's take a look below. ”

The group took the elevator and rushed to the next floor. This time, everyone had the experience of the last time, and they all held on to the wall of the elevator compartment, but the feeling of dizziness still existed.

When the elevator stopped, everyone rushed out, and found that unlike the observation deck built by the sci-fi silver-white metal and glass above, the eyes were full of gray-brown rocks when they came out of the elevator.

Wang Xiaotian was a little incredulous. He turned his head to look at the elevator entrance, and found that except for the door frame of the elevator entrance, which was a circle of silver-white metal, the rest of the place was bare rock.

It's so incongruous. It's as if in a splendid palace, a rough room suddenly appears without any decoration, which makes people feel awkward.

Everyone was amazed. However, they soon led the Master of Obscurity to the exit.

The exit is on the right side of the elevator and is a spiral staircase. Every few steps, there is a lamp, but you don't have to go in the dark. After walking around the stairs for about five or six minutes, Wang Xiaotian counted them, a total of one hundred and sixty-nine steps.

Then, a corridor appeared in front of the crowd. The corridor is more than three meters wide and has lighting on the top, although it is not as bright as day, although it is not the upper floor, but you can see the environment clearly.

Everyone walked forward for more than ten meters, and Zhou Ziheng suddenly smelled a faint smell of blood. As he walked, he asked, "You said you sent a group of people down just now?"

Yalan nodded and turned to look at Guo Ding.

Guo Ding hurriedly replied: "Back to Your Excellency, ten people were sent before, and they should have come about ten minutes earlier than us." ”

Zhou Ziheng was vigilant, and immediately stopped and shouted: "Everyone be careful!"

At this moment, an electronic synthetic female voice suddenly came: "Alarm! Alarm! There is an illegal intruder!"

Then throughout the corridor, a shrill siren sounded. The sound of sirens was followed by the sound of metal scraping against the ground.

Everyone was nervous. As the sound approached, everyone saw that in the distance suddenly appeared a row of strange things slightly larger than calves, with tracks at the bottom, and four arm-thick pipes sticking out of the middle and upper parts.

Wang Xiaotian quickly calculated, there were at least twenty such strange things!

The crowd didn't know why, and slowly retreated in fear. The monsters tweaked the tubes as they pushed forward.

Zhou Ziheng was vigilant and shouted: "Be careful!

At the same time, he waved his arm suddenly, and used his arm as a sword to cut out a sword intent, only to hear the sound of "click" a few times, the three tracked machines on the left side of the first row were cut in half, and the second on the right of the second batch and the first on the right of the third row were also cut, and the arc flashed at the fracture.

The tubes of the remaining crawler robots began to emit blue light, and with a "snort" sound, I saw a section of blue light spraying out of the tube and shooting at everyone.

Blue light weaves in the air, a fine net, and everyone is the fish in the net.

Zhou Ziheng drew his sword, his body was like electricity, and while the light network had not yet formed, he shuttled through the gap, fell behind the crawler robot, and killed from behind.

When Master Obscurity saw the light net, he immediately shouted, "Retreat!" and then waved his sleeves, and a soft and huge force pushed everyone back quickly without touching their feet.

Wang Xiaotian reacted the fastest. When those robots appeared, he realized that something was wrong, and immediately picked up Cao Lianyou and turned around and ran back. As soon as I ran two steps through the crowd, I saw two doors at the entrance of the corridor, which were closing rapidly!

Wang Xiaotian hurriedly accelerated and rushed out like lightning. Wu Ling'er saw Wang Xiaotian running out, and subconsciously followed, her speed far exceeded Wang Xiaotian, and after Wang Xiaotian ran out of the corridor, she followed closely and came out.

Then, the two gates closed tightly, separating the three of them from Zhou Ziheng and the others.

Wang Xiaotian put down Cao Lianyou and looked at Wu Ling'er. Wu Ling'er nodded to him, meaning that she understood him and was worried that there was danger inside, so she ran out with Cao Lianyou in her arms.

One of Wang Xiaotian's hands was tightly held by Cao Lianyou. The incident happened suddenly, and Cao Lianyou was relieved from the tension.

With his other hand, he patted the door at the entrance of the hallway. There was a heavy but clear sound from the door. It is clear that the doors are made of heavy metal, not the rocks that appear to be on the surface.

At this time, several screams came from inside. Wang Xiaotian hurriedly shouted vigorously: "What's going on inside?"

After a while, Shen Shuming's voice came from inside, "It's okay, a few unlucky ghosts have been hit." I didn't expect you to react fairly quickly to danger, haha. Are you in danger out there?"

"No...... Presently...... Haven't found it yet. ”

"Get out of the way, I'll see if I can break open the door. ”

Wang Xiaotian hurriedly took Cao Lianyou and ran to the spiral staircase, and Wu Ling'er blocked outside and stretched out his arms to protect them like an old hen guarding the chicks.

After a while, there was a loud bang inside the door, and the whole cave shook. But the door remained untouched.

"! It's super alloy. Are the people of the old era so wasteful? A partition door, also made of super alloy. ”

Wang Xiaotian suddenly had a bad premonition in his heart. The sudden appearance of a robot that closes the partition door for no reason is no coincidence.

He reached out and patted the wall, and found that the sound was definitely not rock, and the wall did not even fall off the powder. Could it be that this spiral corridor is also made of super alloy?

He quickly drew his bayonet sword and stabbed it with the Force. There was a piercing grinding sound, and the sword pierced into the wall about four or five centimeters, and it could no longer go deeper.

Wang Xiaotian was surprised. Let's not talk about whether his Force is strong or not, just say that this stabbing sword is a sixth-level weapon, and sharpening iron like mud is by no means an exaggeration, but a true description.

But with this sword, he could only penetrate four or five centimeters, which shows that the metal used to make this wall is by no means ordinary steel.

If the entire cave wall, and the walls of the hallway just now, were made of this metal, the sheer number would be staggering.

Moreover, the silvery-white metal on the upper layer has not been corroded or rusted for thousands of years, and it is also extraordinary. In this way, how much trench did the people of the old era have to be so extravagant and extravagant?

"Squeak-squeak-squeak......", a sore and tinnitous sound came, Wang Xiaotian hurriedly turned his head to look, and found that on the door of the corridor, there was a knife tip more than ten centimeters long.

The tip of the knife is upwards, and with the piercing friction of metal, a large circle is drawn. Then, with a loud bang, the metal in the circle was pushed out and fell to the ground and split in half.

Wang Xiaotian saw that the thickness of the metal door was more than 30 centimeters, and he was simply mad!

However, he looked at Shen Shuming, who was panting out of the circle on the door.

Well, this guy is a bit more frantic in comparison.

Shen Shuming glanced at the metal on the ground, took a sip, and said with a smile: "Haha, what are you afraid of if you can't smash it, Lao Tzu will cut you open!"

Then, he looked at Wang Xiaotian and said, "Come in." Your master doesn't worry about you outside. ”

Wang Xiaotian originally planned to wait for them in the living quarters. He had a strong feeling that the layer below was full of gloomy aura and was full of conditions, and someone must be secretly making trouble.

His mind raced, and he secretly analyzed: Who is it? Purification Sect people, or is there someone else?