The night wind was very cold, and Lu Xun walked under the wall alone.

It was empty, and there was no one around.

Separated by a wall, outside the wall is a dangerous forbidden area, and inside the wall is the academy on which human beings depend. I don't know when it began, Lu Xun has become accustomed to living in the square inch, and only by returning to the safe zone can he feel at ease, and the humans of this era have probably forgotten the feeling of crossing the ocean across the world, they are struggling to survive in the gap between hunters and zombies, hunger and death, and keep themselves in captivity.

Sometimes, Lu Xun feels that the real enemy of humanity is not zombies, nor hunters, or even doomsday viruses...... It's the world itself.

In the past, Lu Xun rarely considered these problems, because he was just a little brother, the colonel's younger brother, Zhao Gao's younger brother, and the director's younger brother.

At that time, Lu Xun felt that it was good to be a little brother, and when the eldest brother had to brave the rain of bullets and bullets to take the lead in the charge, the younger brother could shrink his head behind the eldest brother, and if there was a bullet on the opposite side, he would kill the eldest brother first. Lu Xun thought that he would continue to be a little brother until he eliminated the doomsday virus and hunter zombies and ushered in the rebirth of the world.

These people you know...... For example, Zhao Gao, Lemon, Belle, Luo Cheng, and Colonel, they can all survive to the end unharmed.

But one day, everything turned upside down.

Zhao Gao died.

At this moment, Lu Xun suddenly realized that no one had stipulated that no one could die, since Zhao Gao would die, then Lemon might also die, Belle might die, Colonel might die, and even the human race itself could be extinct...... The world doesn't always go in a good direction.

Who said that the world would always get better?

Was his time really just the darkness before the dawn?

Lu Xun climbed the stairs up the watchtower, the watchtower was more than six meters high, he stood on the watchtower and looked at the dead city at night, the huge ruins were like a tomb, and there was a faint screaming sound undulating in the distance.

"I'm probably going to be in this world for the rest of my life." Lu Xun smiled, "It's good that it's me, if it were someone else, I would have gone crazy a long time ago." ”

Lao Jia didn't speak, and he was rarely clean.

"How long have I been here?"

"It's been almost two years." Lao Jia replied.

"Do you think I will be able to see the day when human society will be rebuilt in my lifetime?" Lu Xun asked, "Or the day when human civilization will completely perish?" ”

"The development of human civilization is a very long process, which requires thousands of years of time and the efforts of generation after generation." Lao Jia said, "But now you are equivalent to cutting the number and releveling, and many things are already available from the beginning...... For example, knowledge and technology, for example, your brains and resources...... But the biggest problem isn't here. ”

"What's the biggest problem?"

"From a biological point of view, if a population wants to reproduce steadily, it has to be large enough to be genetically degraded due to inbreeding." Lao Jia said, "For organisms with sexual reproduction, the exchange of different genes is conducive to the evolution of the population, while homologous genes will increase the incidence of genetic diseases." For example, if you put two horses, one male and one female, in a pen and you want to breed a stable population with them...... This is impossible, and even if they give birth to more children, the population will perish in frequent inbreeding. ”

"This is a problem that cannot be solved by technology and knowledge, because it is a limitation of your innate existence as living beings." Lao Jia continued, "There are only two hundred of you now, and this number is too small to dilute the large number of homologous genes that exist, even if you are not attacked by hunters, sooner or later you will become extinct due to genetic degradation." ”

Lu Xun was silent and did not speak.

"From ancient times to the present, no matter what civilization it is, there is only a dead end for those who are self-contained, and only by going out can they develop and grow." Lao Jia whispered, "But you have built a wall to enclose yourself and become psychologically dependent on this wall, which is undoubtedly digging your own grave...... In my eyes, outside the walls are hell, inside the walls are graves, and you dig your own graves and live in them. ”

"If we hadn't built this wall, we wouldn't have survived to this point." Lu Xun shook his head, he looked at the dark ruins from afar, "Go out?" You tell me...... Where can we go? There is still a remnant of life in the grave, and there is only one way to die in hell. ”

Lao Jia sighed, "Then this is an unsolvable dead end...... The only thing that lies before humanity is destruction. ”

"Not necessarily." Lu Xun said softly.

Lao Jia was stunned.

"Why?"

Lu Xun squinted his eyes, his hair and the corners of his clothes were swept by the cold wind, "Mr. Lu Xun once said that there was no road in this world, and when there are more people walking, it will become a road." ”

Lao Jia didn't understand what Lu Xun was doing at this time when he pulled out the famous writer Mr. Zhou Shuren, and did Mr. Zhou Shuren's sentence also apply in this context?

"Is the road made by people?" Lu Xun said leisurely, "If there is only one way in front of us, then we can walk out of another way." ”

Lao Jia was silent for a long time, he felt that this topic was completely deviated from his expectations...... Zhou Shuren is such a serious character.

"I didn't really want to tell you that...... The reason why I told you that genetic degradation will lead to the extinction of the population is that I want you to quickly choose one of the lemons and mugwort leaves and pass on your genes......"

Lu Xun immediately choked.

"Why are you dwelling on this topic? Why do I have to pick one? Lu Xun was helpless, "Tell me something about the future of mankind?" ”

"Damn, if you don't pick one, do you want both? What a big appetite...... Aren't you afraid that Lemon will castrate you with a knife? ”

"No...... I didn't mean that......" Lu Xun was weak, "Damn, why do I have to discuss this kind of problem with you?" You're just a robot, okay? ”

"At least in the future, as far as the eye can see, there will be no serious threat to the safe zone, you still have a few more comfortable years to live, and the destruction of human civilization will not happen for a while." Lao Jia said, "But your personal safety will soon be threatened......

Lu Xun was stunned for a moment, a little surprised, he didn't expect that this topic could still be related to himself.

"My personal safety? What threats can I face? ”

Lao Jia's tone was a little pitying, "If you don't make your attitude clear, Lemon will probably come to you with a knife, right?" ”

"For ...... Why? Lu Xun glared and was startled, "I'...... I didn't provoke her......"

Lao Jia sighed, Lu Xun was really too young.

"One thing, Lu Xun, you have to pay attention...... No matter what kind of girl she is, no matter what kind of personality she is, no matter how abnormal and cold she looks, there is one thing that makes her the same as all other girls. ”

"Which point?" Lu Xun asked.

Old Jay paused.

"It's all vinegar."