A day later, Chang'e and the others were ready to enter the fifth layer. Pen, fun, pavilion www. biquge。 After hesitating for a long time, Zhou Xin finally decided to watch Chang'e in action instead of waiting for the final report.

Taking a deep breath, Zhou Xin sat down. "Let's get started." Zhou Xin ordered.

As the familiar roar sounded, Zhou Xin's mood calmed down.

"Regardless of the final result, we did our best." Zhou Xin comforted himself silently.

Just as Zhou Xin comforted himself, the engineering robot opened the passage to the fifth floor.

"Let's go down." Without waiting for Chang'e's report, Zhou Xin said directly.

Chang'e jumped down, the same room, the same door, and when Chang'e was about to push the door open, Zhou Xin stopped her.

"Wait, check the air conditions on this level first." Zhou Xin ordered.

After a while, the detection robot that jumped down with Chang'e reported the results, "There are no toxic substances in the air, the oxygen content is 12%, and the nitrogen content is 85%. The oxygen content is low, but it is barely suitable for the survival of this species. ”

"Reluctantly?" Zhou Xin said to himself, "It looks like something is still going on on this layer." ”

"Go ahead." Zhou Xin waved his hand at the screen, "Let's see what strange things will happen on this floor." ”

Chang'e pushed open the door, and behind the door was still the familiar restaurant, Chang'e walked to the table and touched it, "No one has been active for a month and a half." Chang'e concluded.

Zhou Xin was completely disappointed, "It seems that there are fewer people at this level, Chang'e, I'll leave the rest to you, and notify me when I have the result." After speaking, Zhou Xin walked out of the command cabin.

Lying on the bed in the captain's room, Zhou Xin began to think about this shelter.

"What happened on the first three floors was frustrating, but at least it was an accident. Although I don't agree with the way they handled it, it was their choice. And what about the fourth layer, which inexplicably died at the same time, and the artificial shutdown of the ecosystem, which gave a sense of conspiracy. Isn't it supposed to unite after the apocalypse, what good is it for him to eliminate so many of his kinds, I don't know if the reason for the accident on the fourth layer can be found in the fifth layer. However, the fifth layer has also been inactive for a month and a half, what happened to the fifth layer in this month? Are there any living people on the fifth floor? With a head full of questions, Zhou Xin fell asleep groggily......

I don't know how long it took, Zhou Xin was awakened by the sound of the bedside communicator. Because of the matter of remembering the shelter, Zhou Xin has not slept well in the past few days, and in a daze, Zhou Xin turned on the communicator.

"The investigation of the fifth basement level has been completed, and some anomalies have been discovered, do you need to report it now?" Chang'e's voice came from the communicator.

"I'm done." Zhou Xin, who had just woken up, was still in a daze, "Huh? Done investigating? So fast, how long did it take? Zhou Xin finally reacted.

"It took about 8 hours in total, do you need to report the results of the investigation now?"

"Uh, wait a minute."

Zhou Xin got up from the bed, walked to the bathroom, washed his face with cold water, cheered up, and returned to the command cabin.

"Tell me, what did you find inside the fifth layer?"

"After eight hours of investigation, we found that there were no humanoids in the fifth level, and there was no information left, which is very confusing."

"What? Nothing? Are you sure you've checked everything? Zhou Xin was puzzled.

"It's all checked, including the living quarters, no humanoids have been found in this level, and there are no items that record data, but apart from these two things, there are no other items missing in this level." Chang'e affirmed.

"It's even stranger than the situation on the fourth floor." Zhou Xin muttered to himself, and then he asked, "Is there anything unusual besides not finding anything?" ”

"After a detailed investigation, traces of a fight were found in most places on this level. Although no humanoids were found, blood stains were found on the walls and floors of this level, and even on some objects. Some of the items still show signs of damage, even on the air filter, and the walls are covered with large and small potholes. What is even more strange is that these traces have since been artificially swept away. Chang'e added.

"So there was a big fight here?"

"It could have been several, and in each room we found different traces of fighting. In addition, it was also found that the elevator doors on the fifth floor had been completely removed. ”

"What do you mean?"

"Just look at it."

At this point, a familiar elevator shaft appears on the screen, but there is only one elevator shaft left, and its doors have been completely removed, and now the two metal doors are just right against the walls on both sides of the elevator passage. Looking inside, the upper and lower covers of the elevator car have also been removed, and looking down the elevator shaft, it is obvious that there is a simple ladder between the five or six floors.

"Why don't you use a ladder to put a good elevator, and their energy is so scarce that you can't even start the elevator?" Zhou Xin was very puzzled by this.

"There is insufficient evidence to speculate. In addition, the passage to the sixth floor has been opened, whether to investigate the sixth floor directly. ”

"Since there's nothing left on the fifth floor worth investigating, let's go straight down."

A few minutes later, the assembled robots arrived at the sixth floor along the elevator shaft under the leadership of Chang'e, and after the robot's inspection, this was the last floor of this shelter, and if nothing was found on this level, the investigation would have ended with a bunch of mysteries.

As soon as he reached the sixth floor, Zhou Xin saw the elevator entrance without a door on the camera, and like the fifth floor, the metal doors were all leaning against the wall.

"Go in and have a look."

Passing through the elevator door, Zhou Xin saw the familiar passage, and some traces of fighting could be seen on the walls of the passage, and Chang'e opened the first door along the passage.

It is a small hall that resembles a conference hall, and the interior is neatly furnished. Chang'e walked to one of the chairs, Zhou Xin saw that the back of the chair was broken, and standing next to the chair, Chang'e touched a table.

"There has been no sign of activity for more than half a month."

Hearing this, Zhou Xin sighed deeply, "I'll leave the investigation to you, I hope I can hear some good news." After speaking, Zhou Xin leaned back in the chair and closed his eyes.

An hour later, Chang'e reported a new discovery.

"We found the corpse of a humanoid creature in a room in the living quarters." Chang'e on the screen said.

"What about the cause of death?" Zhou Xin asked calmly.

"The initial speculation is suicide."

"Oh?"

"The corpse has a penetrating wound on its head, and it is also holding a pen-shaped object in its hand, which has been tested to be the energy weapon of this civilization." Chang'e said.

"What about the time of death?"

"Presumably more than half a month ago."

At this time, robots reported the discovery of humanoid corpses, after examination, most of these corpses were suicides, and a small part were killed, unlike the fourth layer, these people did not die at the same time, their death time has been a month, and the short ones have only been dead for more than ten days.

While Zhou Xin was thinking about the situation on the sixth layer, a robot reported a new discovery.

"A special room was found at the end of the living quarters, identify the door number, this room should belong to the administrator of this vault."

"Come over and have a look."

A few minutes later, Chang'e came to the room that the robot had reported on.

Pushing open the door, Zhou Xin saw a person sitting on the chair at a glance, he was sitting quietly on the chair, with his back to the door, and even the sound of the door opening did not affect him.

Chang'e walked over to the chair and reached out to touch the man.

"He was dead, committed suicide, and died about thirteen days ago."

Zhou Xin was silent, and after a while, he slowly said, "Just a few days before we found this shelter. ”

"It's not something that could be expected." The Voyager reassured.

At this time, Chang'e, who was examining the corpse, found that the corpse was holding a notebook tightly in one hand, and the notebook was close to the person's chest, and Chang'e began to try to pick up the notebook.

"Be careful." Zhou Xin reminded, "Don't hurt the corpse. ”

After a lot of effort, Chang'e took the book in her hand. Flipping through the book and taking a look, Chang'e said, "This is a diary. ”

"Oh? The vault manager's diary, which he held in his hand before he died, must have written important information, so let me see it. ”

So Chang'e took the notebook and began to read out the contents, and the following are some important contents recorded in the diary:

On August 15, 7385 ephemeris, "The experiment failed, a global catastrophe occurred, and we were forced to enter this shelter to escape this catastrophe. ”

On August 20th, "we are trying our best to take in people who have survived the disaster, but the capacity of this shelter is almost full, and we don't know if we should take in survivors if they arrive." ”

On August 28, "fewer and fewer people have come to this shelter these days, and today we found a survivor at the door, which is good luck, if he had fallen somewhere else, it would have been more than lucky." ”

On September 10, "There have been no new survivors coming to the shelter in the past few days, it looks like there shouldn't be anyone nearby, we should be all the survivors in the neighborhood, let's hope there are more survivors in other places alive." ”

On September 13, "The probe detected that the air content of the entire planet is decreasing, and the host estimates that the planet's atmosphere will be blown away by the shock wave more than 99%, this news must be kept secret, and I must leave some hope for the people in the shelter." But it's better to close the shelter for any reason, or else to use safety or something. ”

On September 14, "I have succeeded in sealing this shelter for safety reasons, and from now on, this shelter will be cut off from the outside world, and we will not be allowed to enter or leave, and we have become an island at sea, and I don't know if we can get out of this shelter." At the same time, I conducted a census of the Vault, and found that there were now 789 living people in the Vault, excluding those who had died from their injuries, which was slightly more than the Vault could handle, but should be within acceptable limits. However, just in case, it is necessary to start controlling the daily necessities in the shelters. ”

On September 21, "people understood my decision and began to control the supplies in the shelter, and all household items, including food, began to be distributed in a planned manner and without waste, in the hope that this method will allow us to live a little longer." ”

On September 25, "the first person who violated the rules appeared, and in order not to let people know what was going on, I could not open the shelter and drive him away, so I had to punish him for not eating and clean the canteen alone." ”

On October 15, "everything was going in order, and the people of the shelter lived peacefully, quietly waiting for the day when I told them they could leave the shelter." But only I know that day will never come. ”

On October 25th, "Oh my God, there was a disaster on the first floor, and the disaster expanded just as we were about to finish the evacuation of the first floor. The people on the second floor actually destroyed the elevator in a panic, the elevator barely ran for a while and stopped, and lost the elevator, and we had no way to evacuate the people on the first three floors. And if we concentrate all the personnel on the sixth floor on the lower three floors, the remaining materials will not be enough for us to survive. Helplessly, I could only close the passage between the three and four floors, sorry compatriots, in order to survive, I can only make this choice. ”

On November 3, "the three-story space, which was expected to support only 390 people, was squeezed into 599 people, and any system was overloaded, and according to the calculations of the main engine, according to the current situation, the supplies in the shelter would be exhausted in a month and a half." I had to figure out a way to do it. ”

On November 14, "I can't hesitate any longer, after thinking about it for a few days, in order for us to survive, I can only choose to abandon some people." I plan to close the passage between the fourth and fifth floors, because most of the people who came down from the first three floors are temporarily concentrated on the fourth floor, and in order to prevent panic on the second floor, I can only decide to end their lives with my own hands. I'm going to inject hypnotic gas into the air system on the fourth floor, and then shut down the ecosystem on this level and let them go to sleep. If I do this kind of thing, I will go to hell after death, but in order to survive, I will not regret my choice, and I will be left to bear the fault alone. However, I can't do the closure of the passage alone, and if I suddenly lose contact with the fourth layer, they will be suspicious, so I have to find a reason, or use infectious diseases. ”

On November 16, "Just last night, I ended the lives of the fourth people, I am an executioner with bloody hands, only hell would welcome people like me." ”

There are traces of tears on the diary on this page, and it looks like the person who wrote the diary has collapsed, and for the next few days, the diary is blank......