Before the age of eight, the brother-sister relationship between Lin Si and Lin Qiao was still the same as usual, and they would occasionally sit together looking at the rolling clouds, nostalgic for the bits and pieces they used to be with their parents on the ground. In order to better hide their identities, they have never easily mentioned words that would apply on the ground in front of others.

When Lyncho came up from the ground, he brought a ragdoll rabbit with him. Hand-sewn, hand-sewn from curtain cloth by the aunt who used to live upstairs on their floor. That was the only thing Lyncho brought from the ground. But in order to hide his identity, Lin Qiao could only keep this ragdoll rabbit in the cabin at that time, and it was not until Lin Si had his own nest that they had the opportunity to secretly transport it all to their own territory.

Unfortunately, since Lin Si brought 6237 back from the ground, Lin Qiao has never been to Lin Si's lair again, and she began to avoid dialogue with Lin Si, and Lin Si, who was the elder brother again and again, tried to find an answer in Lin Qiao - all he got was the same indifferent and calm feedback as his sister and most people in the entire Sky City.

"Here, all of us should be family, all of us are brothers and sisters." Here's what she said, "You're my brother and I'm your sister, it's too one-dimensional. We are like members of a family. ”

Lin Si looked into her eyes almost a little broken, "But aren't you my sister?" ”

"We don't need to have any special status around each other." Lin Qiao looked at her, and didn't feel the slightest inappropriate thing about what he said, "Because we are here, everyone has meaning for others, and everyone has a role to play in this society. The Federation will decide our fate, and the data will be analyzed to determine the future that suits us. ”

At that time, Lin Si could do nothing but be angry, and after he was evaluated and placed in the second class, and after being assigned a job, the focus of his life gradually shifted. If Lin Si didn't go to her again, Lin Qiao would never take the initiative to come to see him.

She no longer thinks about everything about the ground, she no longer thinks about the hatred associated with her parents, she even forgets those hatreds, the dead in the bunker, like a child who was born in the sky city, a happy life, willing to all arrangements, extremely obedient to the teachings of AI. Their happiness was so pure that it surprised Lin Si and 6237.

Occasionally, Lin Si looked at the Ragdoll Rabbit he had placed next to the bed, often wondering if his initial decision was correct.

But if they had stayed on the ground at that time, maybe the two children would have died a long time ago, and they would not have had the ability to escape through the bunker full of zombies.

Lin Si sometimes tried to take the ragdoll rabbit to Lin Qiao, but unfortunately his sister, the sister who had completely become 4759, was indifferent to this, and even disgusted with this simple and soft design, which was completely inconsistent with mechanical, and did not have the slightest sense of digital beauty.

Since then, the Ragdoll has hardly seen its young owner.

It stayed with Lin Si until Lin Si was assigned to the ground, and the man placed it on the platform of his flying machine. Ten years passed in a flash, and although he never realized that he was being assimilated by the theories of Sky City, he had tried to hide his true self there from the beginning, and had long forgotten what the rules of the ground should be.

He was attached to the city in the sky, the one who exploited and enslaved the survivors on the ground for them.

From the moment they reached the ground, they did not face those survivors with an egalitarian mindset at all. At that time, Lin Si was already thirty years old, and for some reason, it was clear that he himself was from this barren land, but when he looked at the fortress, at the group of people with numb and desperate eyes, he denied from his heart that he was the same as these people.

Which side should he belong to? Even if he didn't forget his hometown like his sister, he was also cowardly and didn't dare to reveal the truth from beginning to end. Wearing a pure white cloak, he became Suzaku's apostle, searching for "scholars" and sending gray-covered ancient books back to Sky Castle.

He was also the one who first discovered the purpose of the Sky City's search for all this, and it was he who told 6237 that all those moral artworks and books that were searched from the ground were destroyed in a centralized manner, and some even human civilizations for thousands of years were burned in this way.

Lin Si was actually shaken in his heart, he tried to find a home for himself, and even wanted to forget where he had come from, so he completely surrendered to the safety of Sky City. At one point, he was very disgusted with what 6237 had done as an adult. He secretly and constantly disrupted the balance and defense of the Suzaku system, smuggling some of the Sky Castle technology to the ground again and again.

But the United States let him go again and again, and later Lin Si also thought about it, and even the United States may not have really doubted him at all. Murong Yuhua's superficial resume is too perfect and too invisible, he is inconspicuous among the workers, he has obeyed management over the years, and has never had a conflict with anyone. The Commonwealth, which had never been on the road, would evaluate each person's work every year, and even the standard value of their evaluation made Lin Si wonder if there were "people" in the Union.

After all, when he and Lin Qiao first arrived at Sky City, this city was cold and not the slightest bit of human anger. The babies live in the nursery machine, and the oldest children surround the intelligent robot with the appearance of a bear, and follow it to learn the bits and pieces of life. He never saw a living person from beginning to end.

Lin Si also remembered the scene in the bunker at the beginning, none of the corpses there were from outsiders, if it was a human attack on them, it was not that there were no warriors in the bunker, so it seemed that there was only one possibility - who had dispatched the weapon, and there was no need for a weapon to be controlled by humans.

Until now, Lin Si believed that the one who ordered to kill all the survivors in the bunker was not a single person at all, but the system, the system that controlled the entire city in the sky, and the system that had been attacked by 6237 as an enemy all along.

Suzaku.

Lin Si knew that he would never be able to completely overthrow the Suzaku system on his own, and this world was sometimes like this, where most of the general public were mediocre, hateful but powerless at all, and could only hope for a specific genius in the end, trying to draw him into his camp.

The only thing Lin Si could do was tell 6237 everything he knew, such as the situation on the ground, the artworks he had seen burned, and the books he had collected.

At that time, it was no longer called 6237, and he gave himself a name, called Murong Yuhua. Lin Si watched the boy in front of him grow into a teenager step by step, and he sometimes knew him better than his sister.

He knew what Murong Yuhua had been working on over the years, he risked being discovered for the woman who had saved his life, researching the neural compartment technology, and in the past ten years, he had created many amazing inventions and expanded his neuron project to various fields.

When Lin Si told him about his plans for Sky City, Murong Yuhua didn't even try to unite some people, he manipulated the robots to sabotage a transportation operation, and hid all the artworks and books in the depths of the fortress.

Then he followed Lin Si to the ground, investigating what kind of group the Sky City wanted the survivors to become over the years. They don't have the slightest kindness for the Suzaku system's decisions, they know that if there is anything in this world that is the most cruel and rational thing, the AI system that guards the entire city is one of them.

The addition of Murong Yuhua slowly rekindled Lin Si's expectation of resisting Sky City, and as time passed, the survivors in the bunker themselves became more and more negative towards Sky City, and with just a little bit of fuel, this situation would naturally be ignited.

Then there was a riot.

The riot lasted for three months, and many people died, and even if humans were equipped with prosthetics, they would undoubtedly be grasshoppers shaking trees in the face of purely mechanical weapons. At the same time, the city in the sky abandoned all the apostles sent to the surface on that land. Lin Si was not surprised by such a result at all, Sky City actually didn't care about the life or death of human beings from beginning to end, all it did was to erase the existence of human beings, and Murong Yuhua made an interpretation of Sky City's behavior after experiencing this decade of confrontation

It's making humanity destroy itself.

The first thing to be eliminated is history, the past, and the brilliant creations left behind. Paintings, statues, poems, songs, everything that man has created.

And then it is knowledge that is destroyed, and it is the height that mankind has reached through one technological revolution after another. It is the best proof that humans are originally different from animals.

In the end, it is humanity itself that is wiped out. The creation of prosthetic bodies is the biggest lie, the human body is gradually being replaced by machinery, and the best way to replace it is to exchange the corpses of zombies.

But what is the nature of zombies? It's human. Zombies will be completely wiped out one day, and even if they don't, if the survivors want to live a better life, the desire for prosthetics and the fear of the outside world will drive humans who have lost history and knowledge to make one terrible decision after another.

Murong Yuhua said that this was just a guess on his own - he hoped that it would only be a guess.

However, the number of newborns who were put on the ground only to fill the zombie vacancy, and those who happened strangely in the outer fortresses, increased. Sometimes the walls are suddenly destroyed, and the fortresses are suddenly attacked......

Too much evidence was in front of them.

Indeed, being in the city in the sky is already more fortunate than too many people. Because they are not the first to be sacrificed. But when the worst thing happens in the future, who knows what will become of these brainwashed guys?

However, what is really worth fearing is that sometimes, Murong Yuhua doesn't even know what he should be afraid of in the end. No one knows what kind of shocking secrets are hidden in that unarrived future.