"Understood. Pen %Fun %Pavilion www.biquge.info" Chang'e replied.

The camera begins to move again, and as the camera moves, Chang'e walks to the door of the passage in the living quarters. Reaching out and pushing open the door, the same passage as the first floor appeared in front of me, and small doors were still arranged in order on both sides. Chang'e walked to the first small door on her left hand and pushed it open. As soon as he opened the door, Zhou Xin saw a humanoid creature lying on the bed in this room.

"Let's take a look." Zhou Xin ordered from the ship.

The camera moves two steps forward and stops, and Chang'e lowers her head to find a layer of bedding on the floor of the room, and a humanoid creature lying on the bedding. The humanoid creature blocked the way to the bed.

"Then check the one on the ground first."

Chang'e squatted down, and Zhou Xin saw the face of the humanoid creature. This face is somewhat similar to what Zhou Xin saw in the video, and it seems to be the life of this civilization. However, unlike a normal face, the face in front of him is slightly swollen and purple. Chang'e examined the humanoid.

"The creature has no signs of life." Chang'e reported.

"How did he die?" Zhou Xin asked.

Chang'e pulled open his neckline and noticed scratches on the humanoid's neck.

"It is preliminarily determined that the creature died of suffocation."

At this time, a detection robot came over to take over Chang'e's inspection, and after a while, the robot came to a conclusion.

"The creature died of hypoxic asphyxiation, which occurred about two and a half months ago, and the body was preserved intact due to the planet's living environment."

"Go see how the guy in bed is." Zhou Xin hurriedly ordered.

Chang'e stepped over the corpse on the ground and came to the bedside, and another face appeared in front of Zhou Xin's eyes. Sadly, however, the same face was swollen and purple. It took Chang'e only a second to come to her conclusion.

"The same cause of death." Chang'e said.

"What about time?"

Another detection robot walked over and checked it for a moment.

"Two and a half months ago." The scout bot came to a conclusion.

"Dead at the same time?" Zhou Xin was very puzzled, and after thinking for a while, Zhou Xin said, "Go to the other rooms to see what the situation is." ”

Chang'e went into the next room and found a person lying on the floor and on the bed, and after examination, it was found that they had also died of suffocation, and the time of death was two and a half months ago.

"Check every room, as soon as possible." Zhou Xin's tone was a little hurried.

While the robots scattered to search each room, Zhou Xin fidgeted and stayed in the command room.

"What's going on? How did you die out of nowhere? And it's also a lack of oxygen, the oxygen content in this layer is so low, is it really the ecosystem that is broken? Is the ecosystem of the bottom five and six layers also broken? Will there still be living people in this underground shelter? Zhou Xin thought wildly.

I don't know how long I waited, but Zhou Xin, who was sitting in the chair, began to be a little anxious. At this time, Chang'e's communication came.

"Report to the captain, we searched all the rooms in this passage, and found that except for one or two rooms that were empty, there were humanoids lying on the floor and beds in all the other rooms, and there were also two humanoids lying on the floor in some rooms, all of them died without exception, and the time of death was two and a half months ago, and the cause of death was all hypoxic suffocation."

Zhou Xin was stunned for a moment, and after a while, he hurriedly asked, "Have you found the cause of the lack of oxygen?" ”

"There is not enough data to draw results." Chang'e replied.

"Continue to investigate, I remember that there is not a machine room on every floor, has it been inspected there?"

"I just finished the investigation of the passage and am preparing to go to the direction of the computer room."

The screen begins to move to the door at the end of the passage. After investigating the three floors, Zhou Xin knew that the structure of each floor was the same, so there should be an empty entertainment room behind the door. However, when Chang'e pushed the door open, the scene in front of her stunned Zhou Xin.

The room was still the same room, but the floor of the room was densely covered with simple bunks. At a glance, these floor bunks were placed on the ground full of places, and it was almost impossible to find a place to stay, and when he looked closely, Zhou Xin found that there were basically humanoid creatures lying on each floor bunk.

Seeing this terrifying scene, Zhou Xin was completely stunned. After sitting for a while, Zhou Xin hurriedly said, "Go and check the situation of these people." ”

In the process of Zhou Xin's daze, robots walked in from the gate behind Chang'e one after another and began the investigation.

Seeing so many robots inspecting in the hall, Zhou Xin hurriedly reminded, "Be careful, don't destroy things on the ground." ”

Zhou Xin nervously watched the robots around him check back and forth, there were many humanoid creatures on the ground, and each floor had to be inspected in detail, and it would take a long time to check these floors, but Zhou Xin had no desire to rest at all, he sat quietly on the chair, watching the robots on the screen walk back and forth, and from time to time there were individual robots stopping to analyze something.

After waiting quietly for more than an hour, the robots finally came to the conclusion that the cause of death of these underground humanoids was the same lack of oxygen as those in the living quarters, and the time of death was also two and a half months ago.

After hearing this conclusion, Zhou Xin's heart completely cooled, and looking at these neatly arranged corpses on the ground, Zhou Xin's heart was faintly uneasy. After a while, a trace of ominous thought flashed in Zhou Xinxin's mind, and even with this ominous thought, Zhou Xin's words were a little hesitant: "Uh...... Go next door...... Another recreation room to look at...... bar. ”

Chang'e didn't hesitate to act, bypassing the corpses of the humanoids, she walked to the door that connected the two recreation rooms. At this time, the uneasiness in Zhou's confidence became even stronger.

Chang'e pushed open the door, and the scene in front of her confirmed Zhou Xin's guess.

Gone are the tables and chairs that had been used for entertainment in this room, replaced by bunks all over the floor, on which also lay the corpses of humanoid creatures.

Before Zhou Xin could give an order, a robot came in from the door and began to check, watching the robot walk back and forth on the screen, Zhou Xin was completely silent. Silently waiting for the robot to finish surveying the room, Zhou Xin became excited when Chang'e reported the same conclusion to him.

"What the hell is going on?! How can there be so many dead people on this floor?! Why on earth are they starved of oxygen?! Is this the end of this shelter?! Zhou Xin shouted excitedly.

"Your Excellency, the system has detected that your mood swings are too high, which will affect your judgment and physical health. Please keep your emotions under control, or you can go and take a break. That's when the Voyager issued a warning.

"Don't worry, I know what to do." Zhou Xin said excitedly, "Chang'e, I'll leave it to you next, investigate this layer thoroughly, don't let go of any new discoveries, and notify me of any new discoveries." After speaking, Zhou Xin collapsed on the seat.

As Chang'e and the robot investigate further, the situation on the fourth floor of the vault is gradually revealed. A few minutes later, Chang'e reported a new discovery.

"We also found quite a few bodies in the passage leading to the elevator, all facing the elevator, and the elevator doors were broken just like on the second floor. But the only strange thing is that the elevator shaft from the fourth floor to the fifth floor is closed, in the same way as between the third and fourth floors. ”

Hearing this, Zhou Xin, who was slumped in his chair, came back to his senses, "What? The fourth and fifth floors are also closed? ”

"Yes."

Zhou Xin thought for a while and said, "Could it be that like the first three layers, what kind of disaster happened to the fourth layer?" But what is the catastrophe that the people below are going to give up so many people? Moreover, they also closed the passage between the fourth and fifth floors in time, indicating that the people below were prepared, otherwise there would be a situation on the second and third floors. What's going on, the mystery of this refuge grows more and more. ”

"There is not enough data to analyze." The Voyager replied.

"Anyway, let's go to the computer room on this floor first, and at least check the ecology first. Voyager, can the information we have so far be able to check for problems with this civilization's ecosystem? ”

"That's okay, I have here a copy of the complete ecosystem of this civilization, except for the energy system, the ecosystem of this civilization is not very different from what we use, as long as it is a common problem, it can be checked."

"Okay, let's go check the ecosystem first."

After five hours of investigation, Chang'e reported her final conclusions.

"After a detailed investigation, we found that there was no obvious abnormality in the ecosystem in the computer room, only some of the machines were aging due to the long operation time, but this did not affect the operation of the whole system. At the same time, the mini-robot also inspected the pipes of the ecosystem and found that there were no broken parts of the pipes. The only anomaly found was the presence of some unidentified liquid found in the pipes, which, upon analysis, did not pose any harm to humans. ”

Zhou Xin was puzzled, "The ecosystem is normal?" So how did they die from lack of oxygen? ”

"After simulating the ecosystem, the ship found that the power of this ecosystem is insufficient, and it can only maintain the survival needs of about half of the population in this layer, and it is initially suspected that these people are dying due to lack of oxygen caused by the lack of power of the ecosystem." The Voyager analyzed.

"Isn't there a two-tier ecosystem down there? Is the ecosystem between layers independent of each other? Although this is a compound safety regulation, it will not even have a valve. Zhou Xin wondered.

"No, it can be connected, but the pipe connection between the four or five floors detected by the mini-robot is also closed." Chang'e replied.

"Di~" At this time, an engineering robot connected to the communication, "After analyzing the log system of the ecosystem, it was found that the ecosystem in this layer was artificially shut down two and a half months ago. ”

"Why was it two and a half months ago?" Zhou Xin patted his forehead, "What happened two and a half months ago, when the ecosystem was artificially shut down?" Could it be that the disaster of the fourth layer is not a natural disaster, but a man-made disaster? Zhou Xin analyzed.

"There is such a possibility, and the ship needs further evidence to support it."

"Then investigate this level thoroughly and see what else you find."

The next day, the investigation of the fourth floor was completed, and in the remaining large rooms, Chang'e did not find any major discoveries except for a few corpses. However, upon examination of their personal belongings, some of the storage spaces were found to contain diaries-like texts, which, while not stating the cause of the disaster on the fourth floor, revealed that their lives were normal before the disaster. A few days before the disaster on the fourth floor, I fantasized about what I was going to do after leaving the vault. However, these normal diaries stopped at the same time one day two and a half months ago. It's as if time freezes in that moment

Zhou Xin became more and more puzzled, what happened two and a half months ago to make an entire layer of life die at the same time, and the disaster happened too suddenly and strangely.

"At the same time." Chang'e continued, "Some of the information revealed in these diaries can provide a preliminary analysis of what disasters probably happened in the first three layers. First of all, the energy pipeline of the first layer exploded due to an accident, and the violent explosion affected the ecosystem of this layer at the same time, so the people of the first layer quickly planned to escape to the lower levels. Due to the escape, the closure of the first layer was not completely completed, and the aftermath of the energy explosion spread to the second layer, resulting in the explosion of the energy system of the second layer. Originally, the second floor was just an explosion of energy pipelines, which had no impact on the ecosystem, but because the people on the first floor were retreating, the people on the second floor began to flee in a panic, and the impulsive crowd destroyed the elevator door on the second floor and opened the way to the third floor. During this time, the first explosion of the second layer was not effectively dealt with, and a second explosion occurred, this time destroying the ecosystem of the second layer. At this time, due to the destruction of the elevator door on the third floor, a large number of people poured into the third floor, although the people on the third floor were not affected by the explosion, but they also began to panic a little, and they began to try to close the elevator door on the third floor to prevent the people above from entering, but failed. ”

After a pause, Chang'e continued: "After continuing to accept some people, the lower floors refused access to the first three floors on the grounds that the population had reached saturation, and the elevator shafts and various pipes leading to the fourth floor were also closed. As for the next situation, it is not written in the diary, it should be that the following layers have completely broken off the connection with the first three layers. As for the result, as we can see, the remaining population of the first three layers is completely wiped out, and there are no survivors. ”

"It's a cruel decision." Zhou Xin's words were a little helpless, "But in that case, it should be the best choice to save some people." ”

"From a rational point of view, they did the right thing in order not to wipe out the entire Vault." The Voyager replied.

"It's still unacceptable psychologically." Zhou Xin said, "That's it, since this is the choice they made, then let's not dwell on it here." Chang'e, did you really not find the cause of the disaster on the fourth layer? ”

"No evidence was found." Chang'e replied, "In addition, the investigation of the fourth layer has been completely completed, do you want to start the preparation work for entering the fifth layer?" Chang'e then asked.

"Let's get started, hopefully the fifth floor will bring us some good news......"