I'm trapped in a cube

"What's that sound?"

Wang Chuan pricked up his ears, trying to identify the source of the sound, but just as he listened carefully, the sound faded away again.

"What's going on?"

After a moment of confusion, he quickened his pace and walked forward.

After walking for a while, he saw a black "wall" appearing in the distance of the tunnel, which "broke" the continuous lighting. The lighting suddenly disappeared there, as if there was only darkness behind.

Wang Chuan's worries flashed away, he took a deep breath, told the recording device what he saw, and then took another step...

He was getting closer and closer to the black "wall", and Wang Chuan was becoming more and more nervous.

Although he is a well-trained special forces soldier, he still feels fear when facing the unknown.

Humans are not machines. He came to this city inexplicably, alone, and his teammates were nowhere to be found. If he had not wanted to gather more intelligence, he would not have risked his life alone and entered this unknown ruin.

"Humanity still knows too little about the sixth layer of the abyss. The more I know, the fewer detours future generations will take."

Wang Chuan's considerations are very simple, without much purpose.

If later comers also get lost in this city, the information he uploads can help them, so why not do it?

As I thought about it, the fear in my heart gradually dissipated.

Although the city looked lifeless and seemed to be hiding many secrets, there was no danger at the moment. The tunnel was bright. Wang Chuan told himself not to let his mind run wild and to get to the black wall as soon as possible so that he could see clearly what it was.

He quickened his pace once again, and the "tat-tat" sound of his shoes hitting the ground kept echoing in the tunnel, as if someone was following him.

The frequency of the sound became faster and faster, and Wang Chuan gradually saw the general material of the black wall.

"It doesn't look like concrete. It looks like... metal."

He walked a few steps forward and saw the strange bulge on the wall again.

The wall is not flat.

"Some kind of hydraulics? And bearings? What's that in the middle?"

After walking a few steps forward, Wang Chuan finally saw clearly what was in the center of the black wall.

It was a crack running from bottom to top, running through the center of the black wall.

A flash of inspiration suddenly occurred to Wang Chuan's mind. After seeing the crack, he put all the vague outlines together in an instant.

"I see! That's a door! That's a door!"

A huge mechanical door occupies the entire tunnel, so there is a gap in the middle, and there are various devices on it. Because this door blocks all the light, the tunnel feels like it is "broken"!

"So it's a door..."

The moment he realized it, Wang Chuan also breathed a sigh of relief.

I hope it’s not something else. After staying in the abyss for too long, I’m always a little startled. I always feel that some strange monsters and strange visions will suddenly jump out. I’m a little paranoid.

"You scare yourself."

After seeing the door clearly, Wang Chuan slowed down his pace and was no longer so anxious. The reason why he was so anxious before was to dispel his doubts and prevent the spread of fear.

Now there is only one door, and it is the familiar mechanical door. The fear in my heart can no longer spread.

But at this time, Wang Chuan began to have new doubts:

How can he get through such a big door?

This giant mechanical door certainly cannot be opened by human power, and the control system that controls the closing force is most likely inside the door. To him, this door is really no different from "a wall".

"Go to the door first and then make plans."

The lighting design in the tunnel is very reliable. Even though the light is a little dim due to aging, it still illuminates every corner. Even where some lighting is damaged, the light from other places can spread over and cover it. It is obvious that it has been designed in a saturated manner and damage has been taken into consideration in advance.

"Did the designer of this section of the tunnel know in advance that the disaster was going to happen?"

In other words, the disaster that this city encountered did not happen in an instant, but was a process? There were already signs?

Just as Wang Chuan was thinking about the design background of the tunnel, he heard the "buzzing" sound again, but it was still very faint. After ringing for a while, it disappeared again.

"It came from behind the door." He immediately locked onto the direction of the sound.

Following the direction of the sound, Wang Chuan finally arrived under the big door.

Looking up at the gate that extended to the top of the tunnel, Wang Chuan finally realized how huge it was.

It was like a high-rise building with a mechanical texture, filled with all kinds of mechanical transmission devices. A pitch-black crack was cut through the center of the gate, extending from the ground to the top. The metal material of the gate exuded a cold black, and even the light shining on it was dimmed, as if it could absorb all the temperature. A faint smoke was floating in the air, like drifting ice mist, making people feel cold all over when they looked at it.

Outside the gate is a tunnel leading to the ruins of the city. What about inside the gate?

Is it a survivor of a disaster or a treasure trove of civilization?

What was that humming sound? Was it the echo of a destroyed civilization?

Looking at the complicated machinery on the gate, Wang Chuan took a deep breath.

He really couldn't separate the appearance of this door from humans. The bearings, hydraulic devices, screws... everything on it were the same as those commonly used by humans. If someone said that this was a product of another civilization, Wang Chuan would definitely be the first to stand up and oppose it.

It was precisely because he felt that this was "man-made" that the coldness in Wang Chuan's heart continued to intensify.

He developed empathy with this destroyed city.

"Perhaps this is a city on the ground, but due to some special reasons, it was pulled to the sixth layer of the abyss. This is not impossible..."

This conjecture gradually spread in his mind, and he began to constantly think about the possibility of this situation.

"Is there any relic that can do this? Or was it some abyssal creature that did it during the abyss invasion?"

Wang Chuan quickly searched his memory for information about the "missing city", but found no results.

There is another question. The technology in this city is more advanced than that in real cities. How can it be a "missing city"?

While thinking, Wang Chuan observed this "sky-high" door.

After a while, he found what he was looking for.

A small door.

"Such a large mechanical airtight door cannot be opened and closed every time a person passes through it. This would consume a lot of time and energy. There must be a small door for people to pass through, either at the bottom of the door or on the side..."

Wang Chuan considered it from the perspective of human design, and it turned out to be correct. This made him dazed for a while.

But he did not hesitate for too long and walked directly to the small door below the edge of the gate. The size of this small door was very close to that used by humans. It could be said that it was "specially designed for humans". There was even a door handle at just the right height.

"What a coincidence, isn't it? What a coincidence, isn't it?"

Wang Chuan muttered in disbelief as he walked to the small door and touched the door handle.

I pressed down gently and there seemed to be no resistance. It was just that the door had not been opened for a long time and the bearings inside were a little stuck.

Use a little more force.

“Crack…”

The door opened.