Yu Shan thinks back to his life of more than 30 years, and now he has been a primary school physical education teacher for six years who physically destroyed the flowers of the motherland, and also has the position of an Olympiad teacher who has the worldview of destroying precocious children; In the past, he was a programmer ape who woke up earlier than chickens and slept later than dogs; In the past, he studied the major with the highest score among the top 985 universities in China - well, which is the highest score, definitely not the best; In the past, when he was young, he could be regarded as a scholar with double studies in arts and sciences.

This guy has also been brilliant, and when he took the college entrance examination, he was the top science student in the Tiedong area of Qibei City. Brackets, the first place for fresh science students, the brackets are complete. In the previous three years of high school career, this guy met a Chinese teacher who exuded the atmosphere of a young woman, and then he didn't know which nerve was wrong, and suddenly he had a strong interest in the language that he had disdained before. Every day after school, I pass by the bookstall at the school gate, and once I have ten or eight yuan in my pocket, I will plunge into it, pick up a large book of world classics, and then read it hastily without seeking to understand it.

I read a lot of books, and I couldn't bear it, this guy had nothing to do, and tried to write something sad by himself, but he didn't think that he would not only publish it, but also won a small prize that was stronger than the consolation prize. This is good, the teacher praised, the classmates held stinky feet, and the old Yu Da had a posture of going to the black in the direction of Wenqing, and then he was once clamoring to transfer from science to liberal arts.

All in all, in the current fashionable terms, Yu Shan definitely considers himself a young science student. The thinking of science students and the heart of a young man make Yu Shan's biggest hobby become science fiction literature.

So as soon as Qiao Si's words fell, Yu Shan couldn't wait to ask: "You wait a while to talk about the rules, and explain the space-time paradox to me first." ”

Joss blinked: "What paradox?" ”

"The paradox of time and space." Yu Shan said very seriously: "For example, you stepped on the **** at the door a year ago, and now you go back to the **** through this door of yesterday to stop yourself from stepping on the **** a year ago...... It's a paradox. ”

Joss began to frown: "Why is it a paradox?" ”

"You think, now you stopped you from stepping on **** last year, but since you didn't step on **** last year, you won't go back to last year when you stepped on **** to stop yourself, so you don't exist now when you stepped on **** last year. And because you have stepped on **** now, you have never existed at all, so last year, according to the established route, you will still step on ****......"

Joss was silent for a long time, then coughed and said, "Did you listen carefully to me just now?" Rule number six, never, never get close to your past self. ”

Yu Shan was stunned, and then shouted in a broken voice: "These are two questions!" ”

Qiao Si shook his head weakly: "No matter how many questions there are, that's your problem." Yesterday's Gate is there, and you have verified its authenticity yourself. ”

"I know, so it's not scientific!" Yu Shan said with a sad face.

Joss continued regardless of it: "These rules are my own summary, and there may be other rules that I don't know, so I can only leave it to you to summarize by yourself." Remember these rules and never forget or ignore them, because each one is deadly. Now you repeat it. ”

Yu Shan sighed, put aside the entanglement of the science students for the time being, and repeated the six rules summarized by Josie.

Joss, who was opposite him, breathed a sigh of relief and seemed relieved, so he said, "Very well, now I can make my final request." ”

"Say it-" As soon as the words fell, Yu Shan glanced at the all-in-one screen on the bar, and connected with the robbery that changed the fate of many people, as well as the strange and inexplicable door of yesterday, and suddenly woke up: "-Wait, old Joe, you don't want me to stop that case, do you?" ”

Qiao Si's face turned pale, and he stared at Yu Shan with burning eyes.

That case seemed to Yu Shan at that time, the sky was simply falling, and their family was in turmoil, and their quality of life plummeted. But now it seems that it is just a period of twists and turns, and the Yu family is still living a mediocre, happy, and short life of parents; But for Jos, the impact is huge, and the aftermath is still there.

Yu Shan clearly remembers that Qiao Si had booked a place for the guaranteed students of the Public Security University early, and even if he was not guaranteed, he had a great chance of being admitted to the Public Security University with Qiao Si's results. Because of that case, Qiao's father committed suicide, Qiao's mother had a nervous breakdown and was sent to a psychiatric hospital until she died five years ago.

For Josie, that case was a turning point in his life and a pain in his life. Convinced that his father had died unjustly, he spent seventeen or eight years repeatedly appealing, collecting evidence, and then appealing. If that case hadn't happened, maybe Joss would have successfully enrolled in the Public Security University and lived a different life than he has now.

Yu Shan understands Joss and sympathizes with him as a brother. He thinks about it, worries about it, and sticks a knife in his ribs at the critical moment. If it were anything else, Yu Shan would definitely agree without hesitation, but now this matter is ...... It's so weird!

First of all, Yu Shan couldn't understand what was going on with this yesterday's gate that appeared out of thin air; Secondly, Yu Shan already has a family and a business, and he has concerns. is no longer the stunned young man who can ignore everything, he has learned to think about others. Therefore, without a clear understanding of the gate of yesterday and a risk assessment, he will definitely not joke with his own life.

Therefore, in the face of Lao Qiao's scorching gaze, Yu Shan, who gritted his teeth, was silent.

Long. Joss sighed, "I thought you'd agree." ”

"Old Joe, it's not that simple......"

"It's easy!" Joss pointed to the door and said, "The door is there, go over there, follow the rules I've put together, and wait until the robbery happens over there to stop it, it's as simple as that!" Joss's voice grew louder.

"What are you kidding, if it were that simple, I would have agreed a long time ago. Old Joe, this is a very evil door, have you ever heard of the grandmother's paradox? That is to say......"

Without waiting for Yu Shan to continue, Qiao Si snorted and interrupted, "Are you scared? ”

"yes, I'm scared." Yu Shan said calmly: "What we are talking about now is time travel, and even Hawking and Einstein have not figured it out. As a simple example, what if you kindly save an alcoholic and don't let the drunkard freeze to death on the street, and the drunkard drives a car and hits someone who shouldn't have died? What if the person who was hit and killed was your parents, or just yourself? ”

"How can there be so many coincidences?" Joss pointed to the door, "Since three years ago, I have been walking through that door as long as my body allows. Isn't it time to sit in front of you? ”

"Are you still calling it good?" Yu Shan was furious: "It's a brain tumor!" ”

"Coward!"

"You say I'm a coward?" Annoyed, Yu Shan took off his coat three or two times, lifted off his short-sleeved T-shirt to reveal the centipede-like scar on his left arm: "In the summer vacation of your sophomore year, you fought hard with a few bastards, who blocked this knife for you?" ”

Qiao Si was stunned, fell silent, and said in a pleading tone: "This is my last request, don't you agree?" ”

Yu Shan took a long breath, calmed down, and said, "You have to let me think about it, after all...... At this age, it's no longer for yourself. ”

The argument ended, and the two were relatively speechless and fell into silence.

In the video store, the previous music stopped, and after a short silence, the background music was replaced by Cai Qin's song "Forgotten Time".

"Who is it~ knocking on my window......"

"Who is it~ stirring the strings......"

"That ~ Forgotten Time ......"

"Gradually~ it came out of my heart......"

The singing voice floating out of the stereo seemed to have magical power, pulling Yu Shan's thoughts to leap, through time and space, and staying on the fragments of memories that were either joyful, sad, bloody, or dull.

He remembered his childhood when two snotty children had jumped up to the roof and blocked the chimney of the hated neighbor with a handful of hay;

reminds me of when I was in high school, when two teenagers in white sweated and laughed on the basketball court;

remembered the sadness and pride when he was drunk after the college entrance examination;

I remembered scuffling with a group of bastards, watching and helping each other, and fearlessly facing the waving fists and swords;

I also remembered the silence of coming out of the hospital, one with a bandage on his head and one arm wrapped in gauze, squatting under the outer wall of the hospital and smoking a cigarette.

"In my memory~ that joyful scene...... Slowly~ came to my mind......"

After a long time, Qiao Si sighed and said, "Yu Shan, you have changed. ”

Yu Shan smiled bitterly and said, "Haven't you changed too?" ”

"Yes," Joss nodded, "The years are the ******...... We've all changed. After a pause, he continued, "I was reckless." Now that you have a family and a job, you are old, and you have to be young, and you are indeed not living for yourself. I'll leave that to you...... It's really not quite right. ”

Yu Shan breathed a sigh of relief when he heard this, and said, "Yes." After a pause, he said, "Don't be disappointed, I just want to think about it, and I didn't say no." ”

"Good. If you think about it, you'd better tell me quickly. You know, I'm running out of time. Joss smiled and pointed to his head. If I'm gone, the spare key is under the mat in front of the store. ”

Yu Shan chuckled in his heart, opened his mouth and didn't know what to say. He knew that he shouldn't stay any longer, so he raised his wrist to look at the time and said, "Then I'll go first, and I'll inform you as soon as I think about it." ”

Joss didn't speak, just nodded.

Yu Shan walked towards the outside of the store, and just pushed open the door of the store, Qiao Si's voice suddenly came from behind him: "Yu Shan." ”

Yu Shan paused, turned around and looked back.

Joss slowly got up from his chair, looked at him and said, "Do you have any regrets that you have been thinking about changing all these years, and you even think about it in your dreams?" ”

"I ......"

"You don't have to answer me, I'm just asking."

Joss held on to the table of the bar, moving a little, and his back was old like an old man who was about to die. Yu Shan remained stunned for a moment when he opened the door, and then turned around and walked out again.

The door of the shop closed, causing the shell wind chimes to rattle. Cai Qin's singing continues: "The slowly falling light rain ~ keeps hitting my window ~ only the silent me ~ from time to time to think back to the past ......"