"Boom!"

The door behind him was tightly closed.

Alone in his own right, he looked back at the two-meter-thick door made of extremely tough and heavy material.

This door has gone far beyond the usual meaning of "door" "to insulate from the intrusion of external forces".

On the contrary, it seems to be a more simple function, the role of "isolation", whether it is outside or inside.

This gate, which has been built for at least 150 years, completely isolates the space in front of Dafang from the outside world.

There is always a reason for the existence of things, just as Dafang never makes meaningless actions, and the makers of this door must also believe that "isolation" is really necessary.

Clean.

Quiet, without a single person.

This is Dafang's most intuitive impression of everything in front of him, the ground is almost spotless, the walls and corridors are white, very bright, very wide, and it seems that it will always retain the light that illuminates every corner here.

This is obviously not a place where people can live, and even ordinary people simply cannot stay in it for a long time.

Clean, bright, white, spacious, any of these words have a positive and important meaning, even so important that human life is inseparable from the places that can be described by these words, whether such places exist or do not exist.

However, "the extremes of things must be opposed", the wisdom of the ancestors has always been extremely correct, and this incomparable correctness shows that when they summarized, they must be standing in the most objective perspective.

Therefore, this place that is incomparably clean, incomparably bright, incomparably white, incomparably wide, and has only one tone of white, is not suitable for human habitation.

As long as it takes a little longer, then there is only madness and destruction waiting for human beings, so for ordinary people, the environment is actually always full of dangers.

We are vulnerable, far less powerful than we think.

Dafang is an ordinary person, at least he has always called himself so, but as a person admired by the people around him, he is still a little different from others after all, he is not an ordinary person, he is an old ordinary person.

At the age of more than three hundred, he can face almost everything without panic, and his thinking is not quite the same as that of ordinary people, at this time, Dafang is calculating the minimum amount of time that he can stay here and maintain a normal state without going crazy.

The result of the precise calculation seemed to make him more satisfied, and Dafang began to walk forward.

"Professor, how long have you been in there?" A curious voice pulled Dafang back from the memory.

Dafang looked at the questioner, it was the eyed classmate, in order to save the credits, he was more active.

"73 hours and 10 minutes." Dafang replied without taking the slightest time to calculate.

The eyed man nodded, as if to gauge how much time he could stay in such a scene without going crazy.

Then he asked, "How long can you stay?" ”

This question appeals to everyone, and is of interest to normal humans who need a relatively small space to sleep in order to maintain a sense of security.

"If it is to maintain a normal state of mind, in this situation and without communication, with my current condition, I can probably stay for about thirteen thousand eight hundred and seventy-two years." Dafang recalled the results of that day's calculations and said.

"Huh~~~~"

There was a boos under the podium, obviously no one except Li Qingfang, Wang Chen, and Zhang Nian would believe it. It's too big, that's the only thing the students have to say.

"Sister, do you think the professor can really stay for so long?" Shirley, who was hiding somewhere, asked Cecy.

"Whatever you brag about, you can believe it, this kind of environment is not enough for a few weeks for the average person to go crazy. Stay away from him in the future, he is not a good person. Secy said casually.

"I think he even has an indescribable temperament than Lin Shen." Shirley pouted.

Secy became more and more vigilant against his sister's dangerous thoughts, and decided to carry out strict prevention to the end!

"Okay, listen to me, don't interrupt me again, this is the last class." smiled generously and waved to the audience.

For a moment, there was silence in the classroom.

——————

The place where Dafang now passed was a huge and empty square, and from the gate that separated the inside and outside, you could see this square, the size of at least ten football fields, empty, clean, and white.

However, it is useless.

There is very little human activity, and it is necessary to use such a large place, in fact, there is no one in it.

At least the information that Dafang had received from the client indicated that there was not a single human in it, whether dead or alive, not even a mouse or a cockroach.

Walking through the empty and useless square, Dafang came to the only door in front of him, and he raised an eyebrow, apparently what was in front of the door had piqued his interest.

Compared to the previous door, which only cared about being heavy, huge and sturdy, the current door was much more technological.

Double doors, but there are no handles, keyholes or anything like that, on both sides of this white and smooth door, there are a lot of instruments, access control devices, and even a very sci-fi helmet composed of light, connected to some instruments, embedded in the white wall.

Dafang looked at a total of nine different and very distinctive things, and the only thing they had in common was that there were four Chinese characters written above these things, first-level permission, second-level permission, and even the highest permission.

The things that are labeled with Level 1 clearance are the most complex and the largest, like a small room, but they are minimal, as they are obviously used to scan the visitor as a whole.

Labeling the highest privilege is the easiest, with only a virtual screen.

At a glance, the nine access controls represent nine types of authority, and the nine types of authority represent the scope that can be deepened.

Dafang walked directly to the separate virtual screen, put his hand on the screen, and his movements made the other eight access controls slowly disappear into the wall.

After a moment of silence, Dafang's fingers moved together, and then he pressed his entire palm on it.

The next moment, the virtual screen also disappeared into the wall, and instead, the door slowly opened.

"Welcome back." After entering the door, a not-so-nice electronic synthesized sound sounded in Dafang's ears.

"I've been here?" Dafang was stunned for half a second, and then asked out loud.

It's just that he didn't get any answer.

Immediately became generous, perhaps because he passed the access control permission that only one person can pass by default, this voice is just a fixed program.

Behind the door is a long hallway, flanked by doors, and at the end of the hallway is an automatic door with a square panel that resembles a DNA scan for palm prints.

Doors, so many doors, it's a world of countless doors.

After selectively pushing open a few doors, Dafang found that the structure of the room was exactly the same size, and they were all clean and empty.

He didn't mean to stay any longer, and walked straight towards the automatic door.

"Welcome back." The unwavering synthesized sound sounded again.

Walking through the automatic door, Dafang finally heard a little anger in this world composed of pure white and countless doors.

"Smack!"

Following the crisp thud, he noticed an object behind a similar reception desk.

is a moving object.

Although the rhythm of the other party is full of mechanics, and the same movements are repeated over and over again.

But, at least it moves.

It's a robot that seems to be a receptionist.

Bypassing the counter, Dafang saw the other party and what it was doing.

It is a common robot, with a metal shell of skin, human limbs and a head, with human-like facial features, but no ears, and eyes replaced by two bright red carbon lamps.

The robot's eyes flashed with blood-red light, and he said in an extremely rigid voice, "What service do you need?" Is it a whole deletion? Or delete it entirely? Or delete it entirely? ”

As soon as the words fell, the receptionist robot waved down with his right hand, and another impact sound came.

I saw a robot of the same model that was pressed on the table and was constantly struggling, and the receptionist easily cut off his head.

The head grunted and rolled to the side.

As his head rolled, Dafang found that there were still many identical robot heads rolling down the place.

"Woo~~Professor~~, let's not listen to horror stories, it's good to change one~~~" A timid girl said coquettishly, seemingly a little scared, and her request was agreed to by many people.

"Professor, what is the basis for you to infer the highest clearance based on the level 5 clearance that the delegator told you?" The man with glasses stood up again and asked his own questions.

Dafang, who was pulled out of his memories again, seemed to be a little unhappy, he frowned and said: "Let you not interrupt me, now I want to punish you, punish you for coming with me to the virtual visual space, and take a look more intuitively." ”

"Ah~~ Don't!" Quite a few people panicked.

I saw a generous wave of his hand, and all the students present suddenly ended the noise, lying or leaning, and they all stood still in their seats without movement.

Then Dafang also closed his eyes and entered the virtual visual space together.

A cold color flashed in Secy's eyes, and he said coldly: "Hmph! Using his spiritual consciousness as a server, using the virtual sensory space as a tool to connect with each other, forcibly connecting the spiritual world that carries nearly 100 people, he is definitely not an ordinary person! ”

Shirley said nonchalantly: "Maybe the professor is extremely strong, and can withstand everyone's positive and negative conscious and subconscious, fantasies and emotions. Connecting the minds of 100 people, there are many people in the soul realm who can do it. ”

"Let's go in and have a look, the professor must have deliberately let go of his authority for me, hehe." Shirley said happily, and then she also closed her eyes and entered a virtual world created by Dafang.

When Ceci saw her sister's movements, she didn't care about suspicion anymore, and hurriedly followed to connect her consciousness.