The replacement cycle of human cells around the renewal of human cells is generally 120-200 days (except for nerve tissue cells), and all of them are replaced with new cells about every 6-7 years. There is a small story in "World Wonder Story 2012 Spring Special", "After the Age of Seven", which tells a bizarre story of "changing children" based on the replacement and survival of the fittest.
And their replacement method is to directly dispose of the 7-year-old child with bad grades as garbage, and then give the parents a new child with good grades...

The male protagonist is called Yihai, who is almost 7 years old and lives in a happy family, with a gentle and considerate mother and a loving and upright father. One day he told his parents at the dinner table that his 7th birthday was coming, so his parents promised to go to the playground with him when the time came! Young Ichikai was looking forward to the arrival of this day, but he did not know that a disaster was quietly descending on him.
Xiao Yihai is not a particularly good child, it can be said that "morality, intelligence, physical fitness and beauty" in addition to "morality" can not see how for the time being, the others are all failed. When I was in physical education class, the teacher asked everyone to practice vaulting, and Ichikai wanted to run, stand, and jump as usual, but the result was still a butt to do it, and it failed. Fortunately, he has always been the second to last, and there is a little boy named Shota in the class. But who knew that this time Xiang Tai dashingly supported with his hand, and he easily passed, and yihai tragically changed to the bottom.
Curious Ichikai asks Shota how he did it, making so much progress at once? Shota replied that it was because he had passed his seventh birthday that he had become better, and comforted Ichikai that he would become very powerful when he was seven years old. But the strange thing is that Shota actually forgot Ichikai's name, and he couldn't remember it, or another female classmate, Yuko, secretly reminded him that he called out Ichikai's name.
At this time, the physical education teacher, who was still very gentle, saw that the three of them were whispering, and immediately came over angrily to reprimand, and bowed his head and whispered something threateningly in Yukiko's ear. Yukiko was frightened and apologized to the teacher in fear.
But the seeds of doubt had been buried in Ichikai's heart.
Yihai felt that he had left too much homework recently, and he still wanted to try to catch up, so he took the homework on the way to the cram school by bus. But helplessly, the "scum" attribute defeated the "xueba" attribute, and he slept precariously, and sat down on the station, under a station called "Under the City".
Yihai was afraid of missing the tuition time, hurried to see the stop sign, and wanted to change. As a result, I saw the figure of my parents not far from the station sign, and there was a little boy next to them, and the three of them talked to each other from time to time, as if "a family of three". Although Yihai was confused in his heart, this sense of rejection made him dare not come forward, but just stood where he was, watching them go away.
When I got home, at dinner, I asked my parents what happened in the afternoon, but they looked at each other and immediately denied it, saying that they had never been out! Moreover, they reversed their original gentle attitude, sternly asked Yihai not to mention this matter again, and said that his seventh birthday was coming, and he had to work hard - it was seven years old again!
At night, someone sneaked into Ichikai's room and took a saliva sample from his mouth while he was asleep.
The next day at school, Ichikai can't wait to share what she saw and heard at the station with Yukiko, and Yukiko listened and quickly asked Ichikai if her birthday was coming? Then tell her that she only learned about it on her seventh birthday, that there was a walled building at the terminal station...
The teacher suddenly appeared and interrupted Yukiko's head, and Yukiko lowered her head in fear. In order to let Yuko accept the lesson, the teacher stretched out her foot and violently stepped on her foot with the heel of her high heel.
Poor Xizi did not dare to make a sound, but silently picked up her school bag and left, and before leaving, she said an obscure word to Yihai, "Goodbye Yihai, if you can see it again."
Yihai secretly went to the building at the terminal station, but he did not expect to be mistaken by the security uncle there who thought that the child had run out of it and pulled it in. There were many children there, as if they all knew Ichikai, and everything was as equipment as ordinary schools.
Yihai is suddenly pulled away by a child, and when they run to a stair where no one is there, Yihai finds that he looks exactly like himself!
The difference is that this child learns better than himself, can memorize multiplication tables, and vaults horses. Through chatting, I knew that this little boy had the same birthday as himself, grew up in an orphanage, and was only allowed to see his parents once a month.
Speaking and talking, the time for a sea cram school has arrived, and the two little friends who hate each other have to rely on each other to say goodbye. In the dead of night, Ichikai's parents became nervous and said strange things like "This day has finally arrived."
The next day, Ichikai's seventh birthday arrived, and his parents took him to the amusement park to play. However, Yihai found that they were not happy, and even a little impatient, staring at the mobile phone from time to time, with a heavy heart. While riding the cable car, Yihai asked his mother what was wrong, and his mother, who had always been gentle, slapped him hard, saying that he would soon know what was about to happen! And motioned for him to look below.
Yihai looked down and found that the security guard he met yesterday was standing below with the little boy who looked exactly like himself, staring straight at him, and his mother said, "That is also the child born to my father and mother." ”
Later, the two children were taken to a small room, and the doubts in Ichikai's heart were answered:
It turns out that the decaying and declining country has opened a "survival of the fittest" program in order to save itself, and the newborns will be cloned, one raised by the parents and one raised by the national orphanage.
The orphanage is like a "spare part", and when the time point of seven years old arrives, the genes and behaviors of the two children will be analyzed, and the excellent one will continue to be raised by the parents, while the inferior one will be recycled by the state and disposed of like garbage.
Today is the day when Yihai and his parents are separated, because the test shows that he is not qualified.
Poor Yihai did not want to believe all this, but his parents had given up on him and the feelings they had spent together for seven years, overthrowing him to the ground and talking affectionately to the replica Yihai. The remake of Ichikai says that he will replace him as a good adult!
Yihai was thrown into the car, and there were many children who were eliminated like him. He shouted at mom and dad and slammed the car door hard, but in response to him was the indifferent waving of the new "family of three".
Yihai's parents even said with emotion: "This reminds me of the old days." It turned out that my parents were also raised in the orphanage, and when they became "excellent" at the age of seven, they were able to be trained by their parents.
As soon as the camera pans, Yihai, who is asleep on the bus, is woken up by the driver, who breathes a sigh of relief and feels that he is just dreaming. Maybe after getting out of the car, a car slowly drove out of the corner, exactly the same as the one that grabbed him in the dream...
This act was carried out under the National Act on the Promotion of Superior Education, but it seems to me that the country can never expect progress from this inhumane program.
First of all, "creating" a perfect child itself is contrary to the laws of nature, the world is balanced and developed, allowing the existence of diversity to promote development, this plan unifies the child into a good academic performance, does not allow active thinking but poor grades to exist, losing the possibility of multi-directional development.
Secondly, the society without emotional ties has turned the parent-child relationship into a cold production line, and life is no longer full of tension because of joy and sorrow, but has become an AI that only cares about performing tasks - this kind of society without blood and love, who will truly dedicate themselves, then what about development?
But what is extremely frightening is that the real world is still joyfully creating such a "perfect child".