Yep

Loose parts are scattered around the table.In the center of the table, there is a starry sky model that is about to be completed.Big and small planets are placed in predetermined positions, and the masses and distances between them are strictly calculated through gravity.In this way, after the electromagnetic field is turned on, they can rotate along the predetermined trajectory.

Xu Jianian sat at the desk, slowly polishing the last two planets in his hand.

The interior of these planets is hollow, and they will collide with tungsten filaments that can emit light. The surface materials are different, and the light effects displayed when they are electrified are also different.

He finished alone, when there was a knock on the door suddenly, Xu's mother opened the door and asked, "I'm going to buy vegetables, what do you want for lunch?"

Xu Jianian: "It's fine."

Mother Xu ordered again: "Go down later and water the garden."

Xu Jianian: "Okay."

During the conversation, there was a sudden noise from downstairs. Mother Xu glanced out the window and saw a big truck parked next door, and people from the moving company were moving everything in.Among the many sundries, Mother Xu saw a brand new astronomical telescope.

The telescope has a black tripod and a white mirror body. When passing through the sun, it seems to shine like its own light source.

Mother Xu followed the binoculars with her eyes: "A newcomer has moved in from the opposite side."

Xu Jianian: "Yes."

Mother Xu: "He has a telescope! There are a lot of equipment, I don't know what it is."

Xu Jianian: "Yes."

"It looks like an artist or something," Xu's mother said regretfully, "My friends in the community and I knocked on the door last night, but unfortunately no one came to answer the door, maybe the other party hasn't lived in yet. After all, the house must be ventilated... ..."

Xu Jianian doesn't care what kind of artist lives next door, nor does he care how many telescopes the artist next door has.

Most of his energy was concentrated on the small things in his hands, and he responded perfunctorily to his mother. When Xu's mother closed her voice boringly and went out to buy vegetables, he also completely finished the starry sky model.

He placed the last planet in the starry sky and turned on the power.

Lights flickered and the planets spun.

The starry sky model "lives" and is quite magnificent.

After Xu Jianian verified that there was no problem, he collected the things and went down to the garden to water the flowers and plants according to his mother's instructions.

At ten o'clock in the morning, the sun hanging in the sky was still a red fireball accumulating heat. Xu Jianian carried the hose and just turned on the faucet when he saw a familiar voice suddenly flashed from the next door that he didn't care about. Then, this The person in the black T-shirt came to the edge of his garden in a few steps, looked left and right, but no one noticed, so he raised his long legs and stepped into the garden in front of him!

For a moment.

Xu Jianian was speechless.

Yesterday was far away, today is very close.Two days after he met Sheng Xunshu, when he felt that there was still a country between them, Sheng Xunshu actually lived next door to him?

Then he recalled:

It's okay, if you are arrogant, you dare to break into a private house in front of the owner.

Xu Jianian raised his eyebrows: "Why?"

Sheng Xunshu: "Come and see you!" He approached with a playful smile, "Come here, are you watering the garden? I'll help you."

Xu Jianian didn't need it.He moved his chin to the side, signaling Sheng Xunshu to play while he continued to water.

Sheng Xunshu was not discouraged. Xu Jianian didn't want him to help with watering, so he found something to do by himself. He walked around the garden, kicked the railing in the corner, and found that there was an ant nest on the railing.He shook the ladder clipped to the house again, and found that the ladder also made a "clicking" sound.

He suddenly had an idea!

Xu Jianian walked around the garden, basically taking care of every piece of lawn.

He turned off the faucet, put away the hose, and suddenly heard a "dang dang dang" sound. After following the sound, he found that Sheng Xunshu somehow ran to the top of the ladder, and was sitting on the ladder with iron nails to strengthen the ladder.

Xu Jianian looked up for a while, and saw a familiar face.

The morning sun blurred the young faces.

That face was familiar to Xu Jianian, but also strange.

I have to describe it, just like a photo that was already yellowed and old was suddenly taken out from the depths of the album and wiped new. Although it did become bright and vivid, but in the gap of time, those past Old, vaguely reminiscent.

Xu Jianian's inner feelings were a bit complicated.His gaze stayed for a little longer, and soon he saw the other party's loose soft hair fluctuate suddenly, and then, a pointed nose was exposed.

With a sudden movement of the pointed nose, it slid down from Sheng Xunshu's head.

Sheng Xunshu on the ladder quickly stretched out his hand, grabbed his pointed nose, and the moment he caught it, his face twisted.

At this time, the pointed nose also poked out its head, with small eyes and bristling hair, it was the hedgehog living in the garden.

Xu Jianian: "Aren't you afraid of falling if you move around on the ladder?"

Sheng Xunshu: "You are not afraid of climbing over from the air conditioner, but I am afraid that I will fall from such a height?"

"It's walking over." Xu Jianian defended his image.

"Crawl over here." Sheng Xunshu insisted.

"walk over!"

"Climb over!"

The two argued for a few sentences, and suddenly they all stopped talking.

They looked at each other, sure in each other's eyes that they remembered the same thing.

The memory of the first meeting was rediscovered at this time, as vivid as yesterday.

At that meeting, they also argued like this, and in the end Xu Jianian won.

The corners of Xu Jianian's mouth slightly turned up, the joy lingering in his heart, I don't know if it was because of memory or victory.

Sheng Xunshu was equally happy, and this was 100% because of his memory. He was about to speak, but out of the corner of his eye, he caught a glimpse of Mother Xu appearing in the community.

He immediately came down the stairs like a mouse seeing a cat, threw the things he brought into Xu Jianian's arms, and said quickly, "I've already fixed the ladder and the ant pile in the corner for you, your mother is back I'll see you again tonight", and ran around the garden very low-key.

Xu Jianian first glanced at the thing thrown by the other party, it was a cup of new ice cream drink.

He had just inserted a straw and took a sip when Mother Xu entered the house carrying a big bag. Before she put down her things, she was already wondering, "Did someone come to the house just now? I seem to see a shadow."

Xu Jianian stepped forward to take her mother's shopping bag, and glanced behind her, there was no sign of Sheng Xunshu.

Sliding so fast, like a gopher.It seems to have taken my hedgehog?

He thought to himself, and said casually: "No one, it's just a weasel coming, what you see may be the shadow of a weasel."

Xu's mother was stunned: "Why did the weasel appear here?"

Xu Jianian: "I want to eat chicken."

Mother Xu felt something was wrong: "But what I saw was a green shadow?"

Xu Jianian: "This is a perverted weasel."

Mother Xu: "???"

Xu Jianian didn't explain, he opened the door and entered the house.

Behind her, Mother Xu also gave up on the weasel, and instead said, "I bought too many things today, and I lost a lot on the road, but I met a kind man who helped me pick things up, but I don't know why, so I wore a green hat."

Xu Jianian gave a pause for the hands that put the things down.

He also said to himself: "The weasel really took half of the chicken!"

At eleven o'clock at night, the lights in the master bedroom went out.

Xu Jianian was supposed to turn off the lights and go to bed, but half an hour ago, an urgent email from work was sent to his mailbox, and he had to sit in front of the computer with a yawn, and finish this extra work before going to bed. Get rid of it.

The minute hand on the wall moves forward bit by bit.

At fifteen past eleven, the sound of knocking on the glass pierced through the quiet night and reached Xu Jianian's ears.

Xu Jianian's typing hands stopped.

He stood up from his seat, opened the curtains, and saw Sheng Xunshu through the window unexpectedly.

A thin glass separated the two, Xu Jianian put his left hand on the glass, and almost a second later, Sheng Xunshu also raised his hand and put it on the glass.

The two couldn't touch each other, but their fingers were clearly facing each other.

It's quite interesting, like their mutual status for a certain period of time.

Xu Jianian smiled, and said to Sheng Xunshu, "Are you really here? I want to work."

With the glass closed, of course the sound cannot escape.

Can Sheng Xunshu know what I'm talking about?

Xu Jianian stared at Sheng Xunshu's mouth, and the next second, he saw Sheng Xunshu and said, "No, come out quickly, 15 minutes will be fine!"

Oh - Xu Jianian raised his eyebrows again.Do you really know what I'm talking about?

He finally slid open the glass window, and in no rush to go downstairs, he just asked Sheng Xunshu, "Did a voice come from the room just now?"

Sheng Xunshu was stunned: "It didn't come out."

Xu Jianian: "What did I just say?"

Sheng Xunshu relied on guesswork: "You said you have work to do, right?" He emphasized again, "Don't worry, it will be done in 15 minutes!"

Xu Jianian followed Sheng Xunshu downstairs.

He walked through his own garden, then entered another garden that was separated from his own by a community road, then entered the house behind the garden, went up the stairs, and came to the top of the building.

It's been decorated a little here.

A large green parasol stands on the roof of the building. Under the umbrella, there are two long lounge chairs side by side, a small round table, and an astronomical telescope.

Sheng Xunshu pulled Xu Jianian to the reclining chair, pressed him on the seat, and said, "I just observed a few meteor showers tonight. Come and see them, and you can make a wish!"

Xu Jianian brought his eyes closer to the astronomical telescope.

The distant sky was suddenly drawn closer.

The sky is not pure black, but a mysterious blue-black. In the blue-black, a few stars are shining with blue-white light, appearing and disappearing, opening and closing.

Not long after Xu Jianian got closer to the telescope, a meteor dragged its long tail across the sky, lighting up the sky in an instant!

Xu Jianian's eyelashes trembled slightly.

At this moment, there was a "click" next to his ear. He followed the sound and saw that Sheng Xunshu was sitting on the ground at some point, took out his camera, and pressed the shutter on him.

The camera covering his face moved away immediately, and Sheng Xunshu looked forward to asking, "Did you see the shooting star?"

Xu Jianian: "Yes."

Sheng Xunshu: "Have you made your wish?"

Xu Jianian imitated two choices: "Yes."

Sheng Xunshu: "What wish did you make?"

This time Xu Jianian didn't reply.He looked around and asked Sheng Xunshu, "This house?"

Sheng Xunshu said 'hey': "I rented it, so it's close to you, right? We can drop by as we did when we were young. I sorted out two rooms downstairs, one as a dark room for drying photos, and the other What do you think about being your home physics laboratory?"

Xu Jianian didn't think much of it.

He only felt that when he met the day before yesterday, he had already dealt with the house rental procedures and set up his own studio today. Compared with the mistake of delaying his study plan in order to go to an Internet cafe in the past, he seemed to be a completely different person.

After nearly ten years, Xu Jianian finally saw the bad habits disappear from his little partner. Xu Jianian was a little bit embarrassed and emotional, and his mood was generally relaxed.

He glanced at Sheng Xunshu, the moonlight was faint at night, but he still saw a long scar behind the other's ear, the scar was entangled on Sheng Xunshu's neck like a centipede, and the end stuck into his collar .

Xu Jianian thought of some battlefield photos in Sheng Xunshu's solo exhibition.During the war bombardment, Sheng Xunshu was always able to capture the brilliance, happiness, and tenacity of life. Such a strong contrast made people amazed. It was also from then on that his photos began to be accepted and circulated by the crowd.

He seemed to ask casually: "When did you go to the battlefield?"

Speaking of the battlefield, Sheng Xunshu subconsciously touched the wound on his neck: "It wasn't too long ago, just two years ago. I went there in my senior year and stayed on the battlefield for two months."

That was an extremely unforgettable period in Sheng Xunshu's life.

His luck was not good enough. Just half a month after arriving at the battlefield, artillery fire attacked the "safety camp" where he was.The shell hit the soil not far away, and the explosion made Sheng Xunshu deaf and blind. It is said that people will recall their whole life at the end of their lives. At that moment, Sheng Xunshu did recall his past.

Life turned in his mind like a revolving lantern, layers of tulle created by time were torn away one by one, and finally he saw Xu Jianian's figure.

Back in time, the kid next door opened the door and came in, smiling cunningly and triumphantly.

If this is the end of my life.Sheng Xunshu thought so at the time.I wish there was a sentence like this engraved on the tombstone:

"I have a good friend, his name is Xu Jianian."

Of course, in the end, rescue came soon. Sheng Xunshu was not missing any hands or feet except for dizziness and tinnitus after the bombing and a small scar. He was so moved that he went to the local temple to burn incense and worship Buddha as soon as he was able to get out of bed. Buddha bless.

Then he couldn't control his thoughts, got on a plane and flew to the United States.But standing on American soil, he hesitated again, because almost nothing had changed since the last time they met.

He's back in the field again.

That experience was really helpful to him, and it was the photos taken on the battlefield that brought his career to a higher level... Until today, he stood in front of Xu Jianian, although he was nervous, he was also relaxed.

Yes, I did what I promised you back then.

I have caught up with you, and I can stand in front of you calmly.

The brief silence between the two was like a low passing note.

Xu Jianian stood up from the reclining chair.

Sheng Xunshu woke up startled: "What?"

Xu Jianian tapped the dial on his wrist: "It's 15 minutes, I'm going home."

Sheng Xunshu couldn't hide his disappointment: "Another 5 minutes of wind?"

Xu Jianian said casually, "We must have the spirit of contract. After talking for 15 minutes, it will be 15 minutes."

So does the agreement we made back then still count? ——When I can easily come to you, let's be together, okay?

Sheng Xunshu almost blurted out.At the critical moment, he bit the tip of his tongue and abruptly changed his tone: "Alright then, I'll take you back."

Silent all night.

The next morning, the nanny knocked on the door of Sheng Xunshu's room and delivered a cardboard package: "The neighbor next door sent it to celebrate your housewarming."

Sheng Xunshu, who was looking at the photos in the dark room, came out immediately without delay, unpacked the package, and let out a surprise "yeah" when he saw the contents clearly!

The gift from next door was a model of a space planet with a glass cover. The model was exquisitely made, and the stars were magnificent and colorful, suspended in mid-air, emitting shimmering light.Press the switch, these big and small stars can still move along a specific trajectory, this thing can only be prepared by Xu Jianian!

No matter how Xu Jianian feels about me now, at least he doesn't think it's annoying that I move next door to him!

He cheerfully walked around the space model twice, and after looking up, down, left, and right, he suddenly thought: Why did Xu Jianian give me this gift?Because I invited him to watch Meteor yesterday?But this thing...can be done in one night?

He is not sure, always feel that such a beautiful model is difficult to complete in one night.

And there is no need for Xu Jianian to make a similar gift for me just because I invited him to watch the shooting star.

Does this gift have any special meaning?

Space, stars, rotation, universe...?

Sheng Xunshu was a little at a loss.

The thinking of studying physics is really confusing... Wait, studying physics?

He blurted out a piece of junior high school physics knowledge to the model: "Gravity!"

The law of universal gravitation states that the closer two objects are, the greater the gravitational force.

He instantly understood what Xu Jianian hadn't said, and laughed out loud.

Xu Jianian, Xu Jianian, I like you so much.

Do you also like me?

Next door, Xu Jianian, who was cooking in the kitchen, sneezed, his hands shook, hot soup splashed on his hands, burning them.

When Mother Xu saw it, she was also speechless: "Why are you so clumsy at such an age, you can burn yourself even if you cook a soup! Go out, I don't need you in the kitchen."

Xu Jianian was kicked out of the kitchen.

Feeling wronged, he rubbed his nose and thought to himself:

It's not my fault, it's someone else's fault for thinking about me.

Who is thinking of me?

The author has something to say:

Happy Saturday everyone!

I happened to be out of town at the end of May, and I didn't have much time to brush off the tail of this article. I finally got home these two days and started to deal with the final episode.

The extra chapter takes Xu Jianian's subject "Physics" as the title, and unfolds with four kinds of physical content, which happens to be the four chapters of the extra chapter mentioned earlier.