Organisms must adapt to their environment, not vice versa. It's like dolphins have evolved their front and back limbs into fins in order to adapt to the ocean; In order to adapt to the sky, birds evolved wings and hollow bones and feathers; In some caves, creatures have evolved to have an extremely sensitive sense of smell and hearing in order to adapt to dark vision.

The same is true of this adaptation in dimensions. If there are creatures living in a two-dimensional world, their eyes must only distinguish between front and back, left and right, and not up and down. The same is true for humans in three-dimensional space. The human eye can distinguish between front and back, left and right, and up and down, and then realize that the world is three-dimensional.

Then human beings, who are good at thinking, soon discovered the change in affairs, and the change led to the concept of time, so there was the dimension of time. However, all human organs can only see the present, not the past and the future, so even if human beings are aware of the dimension of time, they are still three-dimensional creatures.

By extension, if a person is a four-dimensional being, then he sees himself as a long serpent, a long serpent that encompasses the period from birth to death, from the past to the future. The eye is a three-dimensional organ, so in order to see oneself in four dimensions, one must have a corresponding four-dimensional organ.

Therefore, Yu Shan decided that the brain was not a tumor at all, but just an organ that was developing and adapted to a higher dimension.

The attending physician was stupid by Yu Shan's laughter, and threw a meaningful look at Dr. Jiang, which means 'Is this a brain disease'? Doctor Jiang instantly returned his eyes: "That's right, I have tumors in my brain, can I be considered not sick?" ”

After smiling for a long time, Yu Shan held the attending physician's hand and thanked him vigorously. In the inexplicable look of the attending physician, Yu Shan got up and beckoned Dr. Jiang to go out together.

Yang Rui had been waiting at the door, holding two Yuxi wrapped in black plastic bags in his hands. Yu Shan took it, and regardless of Dr. Jiang's concession, he directly forced it over, said hello and left.

Yu Shan now had one radiation left unchecked, and he suspected that there was no such technology in '98. But in a year or five, I heard that there was a technology to detect radiation levels with a small amount of blood. He plans to go back to the next year or five and find a hospital for a check-up.

After leaving the hospital, Yang Rui asked Yu Shan where to go next.

Yu Shan asked, "What time is it?" ”

"Three zero nine."

Yu Shan pulled the co-pilot of the Mitsubishi Jeep and sat in, and then said to Yang Rui, who was sitting in: "Go to the elementary school, Yucai Elementary School." ”

Mitsubishi Jeep started, came out of the hospital, and arrived at the gate of Yucai Elementary School in ten minutes. Yu Shan asked Yang Rui to stop on the side of the road, and he got out of the car first, and Yang Rui followed closely behind, protecting Yu Shan's safety.

This school carries too many memories of Yu Shan, he graduated from this primary school, and then returned to this primary school to become a physical education teacher after half his life, and his sister Yu Rong also graduated from this primary school. Yu Shan came this time to see his sister at this time.

He stood at the closed school gate, looking at the empty playground with a lot of thoughts, and then reacted, it seemed that something was not right. Normally, even the last class has a physical education class, and it is impossible to be so quiet in the playground.

"What time is it today?" Yu Shan asked.

"Seventh, Sunday."

No wonder no one, the relationship is a holiday. Traveling back and forth through time and space, Yu Shan gradually lost his sensitivity to time. Every time he shuttles, he has to adjust and calibrate the time on his mobile phone, and he has to reverse jet lag physically. It's strange to remember what day it is and what day of the week it is.

Yu Shan's thoughts fell through. He originally wanted to get a cliché from his sister to see if there was anything abnormal about his younger self in this plane, such as headaches and the like. Naturally, it is not possible now.

Yu Shan turned his head and went back to the car, this time letting Yang Rui drive directly back to the compound. The Mitsubishi Jeep started and when it came to the intersection, it was just in time for a traffic accident at the intersection, so that it was completely blocked.

"Brother, let's take a detour, I don't think I can get over it for a while."

"Okay."

The jeep turned around on the spot, drove fifty meters, and got into it through an alley. When he came out again, what appeared in front of him was a path that Yu Shan was extremely familiar with. He is so familiar with this road, during the three years of high school, he will ride his bicycle every day to go to and from school, and during the holidays, he will ride his bicycle and return to the basketball court on campus with a basketball, sweating wantonly.

Yu Shan's heart moved, and he suddenly wanted to go back and take a look. He asked Yang Rui to pull over the car again, got out of the car and walked slowly towards the school gate. Yang Rui beside him followed step by step, Yu Shan saw the brand-new art and sports hall behind the iron fence, he remembered that when he first entered high school, it was still a dilapidated warehouse; He saw the bicycle shed in the open space under the shade of the trees, this broken place was tamped mud until Yu Shan's graduation, and it was good to say on a sunny day, but he couldn't get in without boots on a rainy day. Yu Shan still remembers that he once wandered out of the world, and he was stunned to take his car key to unlock someone else's car, and then was twisted by the senior classmate to the teaching office, and the classmates in this class laughed at Yu Shan; Yu Shan also saw the familiar school uniform. Yu Shan's high school is very interesting, and the school uniform is different for each grade. So you only need to glance at it to tell which grade the student is wearing the uniform. Yu Shan's school uniform is a high-imitation Reebok, and if you speak in conscience, the quality may be stronger than the original. After three years of high school, when it was cold, whether it was playing football, basketball or ice skating, all the big guys had to wear this school uniform. It's such a hard toss, and the school uniform is still intact after graduation. If it weren't for Yu Shan's growth after going to college, Yu Shan suspected that this product could be worn for a lifetime.

When he arrived at the school gate, Yu Shan found that the school gate had not been repaired, and it was still a boxy cement building. The door was half open, and the uncle in the communication room was sitting there looking at the fourteen-inch black and white TV, glanced at Yu Shan, and then stopped paying attention.

In this year, you can enter the school gate casually, but in a few years, it will not work. Yu Shan vaguely remembered that it seemed that a self-financed student and a certain sports student were jealous of a certain girl, and then the self-financed student gathered a group of idle people in society, and took advantage of the evening self-study to rush into the campus and seriously injured the sports student. After the incident, the participants naturally did not have good fruit to eat, and the gate of the campus began to be strictly investigated. The school has issued a new version of the student ID, which must be presented to enter the campus.

Entering the gate, you enter a long concrete road flanked by towering poplar trees. Every spring, poplar hairs are scattered everywhere in the wind. Sensei said that if you ride a bicycle, you may accidentally inhale poplar hairs when you are walking and breathing. Yu Shan can't remember the year the poplars were cut down, and then the school planted French plane trees, and they all froze to death one winter. The next day I had to pull it out and plant a willow tree.

At the end of the cement road is the playground, and on the opposite side of the playground is the laboratory building. Looking to the right, it is the basketball court where Yu Shan has sweated. At this time, the basketball court was full of people, and there was a large circle of people around, and from time to time I heard the students shouting: "High school three-six, come on!" High school three six, one in! ”

Well? High school three-six? Yu Shan was stunned, isn't this his own class?

The vague memory slowly became clear, yes, in the last semester of the third year of high school, the school organized a basketball knockout game, which was used during the lunch break and every Sunday afternoon.

If memory serves, the opponent of this game is the fifth class of high school, a strong opponent that gathers almost all grade sports students. It is not because they are strong because they are very skilled, in fact, these people are very skilled, and they can throw the ball without defense under the basket. These people are powerful in physical fitness and physical fitness.

Is the full-court close-quarters pressing strong? Running crazy for 40 minutes without substitution, are you afraid? In general, these people are a herd of animals. Anyone who plays knows that the basketball level of high school students is like that, usually three-on-three bullfighting, unless it is attacked by the opponent under the basket, most of them keep a distance of at least half a meter, and their hand movements are very clean. When it's time to play, you'll find that some technical players, once they are defended by laymen who don't seem to understand the rules, they can't play any skills. And the end result of the game is often that you don't know how to play and win the game.

This game is like this, the second knife physical education teacher blows the penalty scale is too large, and the opponent's group of cattle do all kinds of actions that harm others and themselves, and the first half of Yu Shan's flight was completely suppressed. In the second half, Yu Shan finally went berserk. In the space of 20 minutes, he hit five of seven three-pointers and sent the opponent away in waves.

At this time, Yu Shan was like Maddie, he was completely unreasonable when he threw it, he threw it when he pulled it up in front of someone, and he dared to turn around and lean back after receiving the ball outside the three-point line, and then he could really go in. Yu Shan felt that this was the only two highlight moments in his three-year high school career, so much so that when Maddie's moment was staged later, Yu Shan also bragged to his buddies, saying that he was also possessed by God back then, and his score was two points more than Maddie. Of course, he didn't say how much time it took.

Stuck in the nostalgia of the past, Yu Shan unconsciously, a smile appeared on the corner of his mouth. Then he suddenly remembered that it seemed that during the competition, his sister also came to join in the fun.

He quickened his feet and quickly reached the edge of the court, walking along the edge as he looked around. Then he saw the short figure in a group of junior high school girls.

At this moment, Down is combing his ponytail and wearing a primary school uniform, and he is jumping and shouting 'come on' with all his might. Yu Shan walked around and came behind the group of girls. He was also embarrassed to squeeze into a group of girls, and pretended to ask casually: "What is the score?" ”

A girl casually replied, "Twenty-seven to thirty-one, our class is still four points behind." As he was talking, the opposing center pulled up the basket almost a meter high, almost took off the rebound with a dunk posture, and added the ball to the basket when his body fell.

"Oops......" the girls sighed. Then the female voice who had just answered said, "It's okay, it's okay, there's still time, go one steadily." ”

This girl is Yu Shan's classmate, with a double character in her name, and she is also a sports student. It's just that after the college entrance examination, everyone was scattered all over the world and never contacted each other again, so much so that Yu Shan even forgot the girl's name. He only remembered that he was bullied by this girl when he was a freshman in high school. The test results of physical education class, the boys and girls set off at the same time, and Yu Shan was thrown away by the girl for a small half circle, which was very embarrassing.

Retracting his thoughts, Yu Shan looked at his sister, Yu Rong at this time is a standout among children of the same age, and it is estimated that she is almost one meter five. He grew up fast, and every day when he came home, his legs hurt noisily. When I got to junior high school, the other girls began to develop one by one, but my sister grew slowly, and then moved forward little by little from the last row of the classroom, and when I reached high school, I was already sitting in the last row.

Later, I learned that leg pain was a reaction to the body's lack of calcium, and my sister complained a lot about it, saying that the family ignored her a little back then and didn't give her calcium, which caused Yu Rong to barely grow to 1.6 meters.

Yu Shan groaned, pretending to see it suddenly, and said, "Huh? Little girl, we meet again! ”

Yu Rong looked back at Yu Shan in a daze, reacted for two seconds, and her eyes suddenly lit up: "Uncle, it's you!" She immediately laughed: "I haven't thanked you well for the last time, I went home and finished speaking, and my parents took me to thank you, but you are gone." As she spoke, she took a step back and bowed to Yu Shanyi: "Uncle, thank you for saving me." ”

"It's okay, it's okay, it's a gesture."

A girl asked vigilantly on the side: "Xiao Rong, do you know?" ”

"Hmm!" Yu Rong nodded vigorously: "Last time, it was this uncle who pushed me, or I would have been hit by a car." ”

The girls looked at Yu Shan with appreciative eyes and chattered non-stop.

Yu Shan said: "I saw that there was a competition, so I came to take a look, but I didn't expect to meet you again." ”

Yu Rong seemed to suddenly remember something, and suddenly said, "Uncle, my name is Yu Rong, what's your name?" My dad told me that I must ask your name when I meet you again, and my mom also said that I must thank you well. ”

"No need, your family is too polite. I'm really just a matter of hands, whoever comes across this has to take care of it, I'm just just in time. As soon as the conversation changed, Yu Shan said, "Why are you watching the game here?" Adults in the family who work at school? ”

"It's not. I'm here to see my brother playing, and he always brags that he's Rukawa Kaede. Yu Rong raised her hand and pointed: "The one who holds the ball is my brother." ”

Rukawa Kaede ...... Yu Shan felt that he was really the second in secondary school at this time. In my memory, when I was a sophomore in high school, the city TV station broadcast an episode of "Slam Dunk" at six o'clock every night. The basketball theme coupled with the exaggerated and funny plot immediately fascinated Yu Shan and Yu Rong. The little brother and sister watched the TV at six o'clock in the morning, waiting for this cartoon to live.

At that time, the boys who could play in the class were generally secondary, and they used to say that so-and-so played well, and they would rely on NBA stars such as Jordan and Pippen. After that, it changed, and if you talk about who played well, you will say who is Rukawa Kaede. When you go to the basketball court, you will always hear the half-grown boy licking the basket and shouting, "Civilian layup".

Yu Shan smiled knowingly and said, "Your brother is in his third year of high school, isn't there another three months to take the college entrance examination?" ”

"Hmm!" Xiao Yurong nodded, and then said proudly: "My brother is very good at learning." Last year, when I was a sophomore in high school, I was always looking for parents, and I secretly went out to play electric in the evening self-study, and the class fell to more than 40. I worked hard for half a semester in my senior year of high school, and now I am in the top 20 in the overall exam. ”

That's right, this is another shining point of Yu Shan's high school days. He herded sheep for a year in his sophomore year of high school, and his grades plummeted, and the head teacher began to comfort his parents, saying that he couldn't get into college, and he would go to a higher vocational position, and it would be good to get a job if he learned to do auto repair or something like that.

Yu Shan remembered that his father also started a serious conversation with him about life and destiny, and it was also after that conversation that Yu Shan was ashamed and courageous, worked hard for half a semester, reviewed all the previous knowledge points, and used the sea of questions tactics to improve his grades to the top 20 in the grade. And this is just the beginning, after a while, Yu Shan squeezed into the top ten in his age and never fell out again. The college entrance examination was even more passed, and finally the first in the school and the first in the district.

Later, in order to reward him, the district also gave him a bursary. The district mayor also personally came to the stage to present him with a certificate of merit, held his hand and said a bunch of words. It's just that Yu Shan's mind was too chaotic at that time, and he really couldn't remember what the district chief said. Yu Shan thought, probably to learn something and give back to his hometown.

"Yes, the top 20 in the provincial key grades, at least you can be admitted to a key university. Your brother must be studying late every day, right? ”

"Yes, according to my father, my brother doesn't come home until eleven o'clock every day, and he has to stay up until two or three o'clock after supper, and he has to get up again at six o'clock in the morning."

This is only temporary. Yu Shan remembered that he seemed to have worked too hard for a while, and when all the knowledge points were learned once, and the teachers began to talk about it for the second time, Yu Shan, who had already mastered the knowledge points, stopped listening to the lecture in class, and simply did the test papers by himself. In the classroom and six periods of self-study a day, Yu Shan was able to complete two sets of test papers for all subjects at the fastest time. Of course, at that time, he was trained by the tactics of the sea of questions, and he only needed to look at the questions and immediately react to the solution ideas, and some questions simply wrote the answers. Only when he encounters a topic that he has never seen before, Yu Shan will do it seriously.

Then Yu Shan went home at night to eat supper and went to bed, and ran to school early at noon to still play basketball. In the last month, Yu Shan was distracted in class, chatting in self-study class, except for a fixed set of test papers every day, most of the remaining time was used for recreation.

So Yu Rong's words made Yu Shan a little unable to hold back a smile. He endured it and said earnestly: "This is not good, the body can't stand it in the long run." It is easy to trigger neuropathic headaches. After speaking, Yu Shan looked at Yu Rong's side face intently, looking forward to Yu Rong's answer.

I only heard Yu Rong say: "Isn't it?" My brother has always had a headache from time to time this time, and he went to the hospital to check, and the doctor said that he didn't rest well. ”

Yu Shan's expression on his face remained unchanged, and his heart beat violently. Sure enough, sure enough! At this time, I had intermittent headaches, and this was not a thing at all in my original memory! What does this mean? This means that there is a high probability that Yu Shan's conjecture will be true.

The impact of that door is not only on oneself, but also on oneself in the past, and even on oneself on each timeline. The so-called tumor is not a tumor at all, but an organ that has evolved to adapt to the high-dimensional space.

Yu Shan secretly clenched his fists, breathed a sigh of relief, smiled and comforted: "It's okay, it's definitely good to wait for the college entrance examination." ”

Xiao Yurong nodded, and then suddenly shouted in annoyance: "Oh, which big bamboo pole has been entered, my brother is going to lose." ”

No one said that Xiao Yurong crow's mouth, the scene on the basketball court was indeed very grim, and the imminent score was pulled away by the unreasonable physical fitness of the fifth class.

Yu Shan smiled and said, "It's okay, you see that your brother is starting to grit his teeth, maybe a god will come down to earth in a while?" ”

"I hope so."

Xiao Yurong stopped talking, and the anxious scene made her clench her little fists and worry about her brother. Yu Shan also stopped talking, with a soothing smile on his face, quietly waiting for the scene to reappear in front of him.

The fifth class attacked, the ball-holding defender mixed garlic by himself, the ball smashed on his feet out of boundary, and the six-class throw-in. The small point guard served, Yu Shan came out of the sideline to catch the ball, leaned back with the ball, and then turned around violently, dribbling two steps to stop the jumper, and the basketball drew a wonderful arc in the air and hollowed into the net.

The girls began to cheer.

In the next attack, the six-class strong attack basket was blocked by the opponent's big bamboo pole with various unreasonable blocks, and the striker had to pass out. Yu Shan received the ball in the vacancy, and the three threats with the ball made the defender lower his center of gravity, and then he pulled it up and threw it unreasonably, and the basketball smashed the basket twice and rolled in.

The girls cheered again.

Two minutes later, the six-class point guard successfully broke the ball and passed the ball to Yu Shan in the counterattack, and Yu Shan pulled out three points at a 45-degree angle and scored again.

At this moment, the audience began to cheer, and some girls in the lower grades began to inquire who Yu Shan was.

After a while, the fifth class failed to attack, the sixth class quickly counterattacked, the pass of his own striker was a little off, Yu Shan jumped up to catch it, and after landing, he was already facing away from the defender. He bobbed to the left, then turned to the right, pulled it up and added a small flar, the ball arced so high that it bounced into the basket in the middle of the rebound.

Young Yu Shan got up from the concrete floor, raised his arms and shouted. At this time, the students of Class 6 were already crazy, first sporadically, and then shouted in unison: "Yu Shan, enter one!" Yu Shan, enter one! ”

In the cheers, Yu Shan received a pass from the point guard, and this time the defender was very close, and Yu Shan began to retreat and control the ball. Two crotches, followed by a large change of direction shook the defender a stumbling, Yu Shan did not rush in, he shot another three points with full self-confidence, and then hollowed into the net.

Now everyone is completely crazy. Xiao Yurong began to jump high, jumping and shouting; The slogan of the girls became: "Yu Shan, so handsome!" ”

The teammates on the field gathered around, red-faced and red-eared and roared.

Yu Shan's eyes were red unconsciously, it was really beautiful, the youth of the past.

Yu Shan knew that he would miss a three-pointer next, followed by a turnaround layup, and then became a class hero. He didn't want to look any further, so he quietly retreated while Yu Rong wasn't paying attention.

Yang Rui followed Yu Shan and walked outside the school, he couldn't help but say, "What's the point of fighting without any rules?" ”

Yu Shan just smiled and shook his head: "You don't understand." ”

Yes, no one can understand Yu Shan's current mood. It was a middle-aged uncle, reminiscing about his lost youth.