On September 30, the tritium tube finally arrived.

Bai Yang went straight to the rookie station after school, took the tritium tube back, and wrapped it in a small brown cardboard box. When he opened it, there was white foam and wrapping paper inside. The tritium tube was only two centimeters long, a thin piece of glass.

The product is very fragile and emits a faint green fluorescence in the dark.

The brightness of the four tritium tubes is almost the same. In a dark room, if you put the tritium tube on a textbook, you can see the writing on the paper around it. One of them seems to be slightly darker. I don't know if it is a psychological effect.

That is indeed the longest-used tritium tube.

Bai Yang arranged four of them on the table in order, and then took down a small wooden photo frame from the bookshelf. Inside the photo frame was a small "Sunflower", a pirated and reduced copy of Van Gogh's original copy.

Version.

Next, he disassembled the photo frame, took out the plexiglass and the paintings inside the photo frame, and then used UV glue to stick the tritium tubes clockwise one by one on the inside of the wooden photo frame in a predetermined order, one on each edge, and then glued them in place.

Then use the UV light to illuminate it again to confirm that it is firmly adhered and will not fall off.

Finally, I replaced "Sunflowers" with "Hatsune Miku in Stalingrad", put it back carefully, and fastened the photo frame.

Turning off the lights in the room, Bai Yang could clearly see the photo frame propped up on the table, and the tritium tube just illuminated Hatsune Miku.

You're done.

As long as he doesn't say anything, no one will know that this thing is a time indicator, they will only think that it is a painting.

Bai Yang stuffed the photo frame into the time capsule, then stuffed pearl cotton into the internal gap of the capsule. Finally, he tightened all the bolts with a wrench and shook it vigorously to ensure that the contents inside would not shake violently.

At this point, Bai Yang’s Time Slow Pass has been completed.

All is ready except for the opportunity.

The next thing to do is to bury it underground.

On the way back from picking up the express delivery in the evening, Bai Yang had already accurately checked the locations. He found four alternative locations, all of which were suitable for burying the time capsule.

Bai Yang let out a long breath and fell down on the bed.

He chuckled, finally completing this big project, why should he brag about his awesomeness in his heart?

Awesome!

Awesome!

niubility!

Bai Yang took out his mobile phone and looked at the time. The current time was 11:30 pm. His scheduled action time was 2 am, so he set an alarm clock for 2 am. The time capsule and shovel were placed under the bed.

The backpack was packed... When the time came, he picked up the bag and quietly went downstairs, dug a deep hole in the dead of night, and buried the time capsule in it. Bai Yang named this plan "Operation Community Garden".

The point is concealment! Concealment! And it’s fucking concealment!

If he is caught by the security of the community, his reputation in this life will be at stake.

I’ll talk to BG4MSR later and tell him that he’s going to bury the capsule tonight.

If she is willing to wait, she can wait until she has buried the capsule and then come back to notify her. Bai Yang estimates that it will be done at about three in the morning. If she does not want to wait until too late, she can also tell her the specific location when she calls tomorrow.

Bai Yang was lying on the bed, staring at the screen of his mobile phone. Time passed by minute by second, and it was getting closer and closer to two o'clock in the morning.

One of the boy's legs hung down and swayed slightly, and next to his leg was a black backpack.

The backpack was bulging, the zipper could not be fully closed, and a shovel handle protruded.

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(Interview transcript·Tough times delivered slowly:

Why is it called Time Slow Delivery and not Time Express?

The meaning of express delivery is that after the express delivery is sent, its transportation speed must be faster than your own. If an express delivery is sent from Hangzhou to Shanghai, and you have it delivered within two days through four links and one reach, China Post, this is called express delivery.

But if you carry the express yourself and walk step by step along the highway to the destination, and you and the goods arrive at the same time, it is not called express delivery.

But movement in space can be accelerated, but movement in time cannot be accelerated.

When Bai Yang dug a deep hole in the lawn, put the time capsule in it, and then filled it with soil, the time flow rate of the capsule was no different from his. There was no time tunnel in the hole that led directly to twenty years later on the timeline.

Above, the moving speeds of poplar and capsule are exactly the same.

The two are moving forward simultaneously. When Bai Yang comes to see it tomorrow, the capsule will still be there. When Bai Yang comes to see it next year, it will still be there. When he comes to see it ten years later, it will still be there.

It doesn't move faster than you. It will take you twenty years to send it twenty years later.

It will take forever for it to reach its destination.

Looking at the whole incident from beginning to end, for Bai Yang, the first time delivery of time was undoubtedly the most difficult. Because he could not figure out the rules and mechanisms, he was completely blind and did a lot of useless work - even though Bai Yang himself at the time

He thought he was quite thorough and had taken into account all possible influencing factors and avoided all possible interferences, but he still failed in the end.

The other party didn't find anything.

He didn't understand why. The only reason before him at that time was that Banxia was lying. Therefore, after the first time capsule delivery failed, Bai Yang's suspicion of Banxia rose to the highest point.

So what were you thinking?

I asked.

Is Banxia lying? Making fun of you?

The boy sitting opposite meditated for a few seconds, then turned his head towards the window. I couldn't see his eyes, I could only see him nodding:

The first reaction was this.

In the second half of 2020, one day during the National Day holiday in October, the author visited the protagonist of this story for the first time. At this time, half a year had passed since everything ended.

Building 11 of Meihua Villa is a very old building with eight floors and no elevator. When you enter the unit door, you can see a rusty mailbox hanging on the wall and an old road bicycle parked against the wall. Follow the

Climbing up the stairs step by step, the eighth floor is on the top floor. There is also a clothesline in the corridor with wet clothes hanging on the rope.

I knocked on the iron door of House 804. The person who opened the door was a young boy - he was already a college student at this time. He was wearing a simple black short-sleeved shirt, his hair was a little disheveled, and he was wearing slippers.

When I first saw him, I knew that this was the person I was looking for, because this young man exactly matched the Baiyang I imagined in my mind, but he stared at me with some doubts for a long time, maybe thinking about the person in front of him.

Is the man in the dusty world the writer who had a long chat with him on WeChat last night?

Bai Yang took the author into his room. He said that he was alone at home now and his parents had left him to travel.

The room is both a study and a bedroom. The space is not large, just enough for two people to turn around.

The author's eyes were quickly attracted by a huge black thing on the bookshelf, which looked like some kind of large radio.

That is……

I asked.

The author has not yet seen the meritorious amateur radio station that may have saved the world, and I can't help but be curious.

Ah, that's not a trick.

Bai Yang smiled.

That was IcR8600, given to me by people from the Free Committee. It was taken away by people from Nanjing University. They said they wanted to study it. The Chinese Academy of Sciences wanted to snatch it, but they didn't.

When the first time was mentioned in the interview, Bai Yang thought for a long time and asked the author a question:

Teacher Tianrui, what do you imagine the slow passage of time looks like?

I froze for a moment.

What does time look like? Probably dig a hole in the ground, bury something in it, bury it for twenty years, and then dig it out again?

Is it that simple? Bai Yang asked.

How complicated can it be? Isn’t it that simple?

Teacher Rui that day, let’s imagine a situation. Bai Yang said, suppose you live twenty years later and I want to give you something. I have an idea in my mind now and decided to bury the time capsule downstairs tonight, but

Before I buried it, I used the radio to notify you and asked you to dig it. Do you think you can dig it?

I frowned and thought carefully.

Teacher Tianrui, do you have this idea: For people twenty years from now, what happens now has become history, so even though it has not been buried in this era, from the perspective of future people, the capsule has already been buried.

ten years?

Bai Yang smiled.

I was stunned and nodded.

In fact, this cannot happen, because there is no way to dig it up. Bai Yang said, I spent a long time exploring and trying, and the first law I summed up - I call it the three laws of time. The first law is "time is slow."

The first prerequisite for slow delivery to be successful is that the sender must know the specific location of the express delivery, or the status of the express delivery must be certain, including spatial coordinates and time coordinates."

At the operational level, the sender must bury the capsule before it can have the prerequisite for slow delivery. Bai Yang said that before it is buried, its status is uncertain. As long as there is uncertainty, time will

Slow delivery has a chance of failure.

After speaking, Bai Yang concluded again:

All in all, any attempt to transport the capsule before it is buried is out of the question and can be vetoed. Just like the example I just gave, even though I plan to bury the capsule at night, there are ten thousand reasons to delay the matter before I take action, such as

He said that I fell down while going downstairs and unfortunately broke my bone.

The author digested these sentences for a while, and then realized a problem:

The first time you sent Time Slow Delivery, you buried the capsule before notifying Pinellia. This satisfied the first law, so why did it still fail?

Bai Yang breathed a sigh of relief and asked another question:

Teacher Tianrui, imagine another situation. You are still living twenty years later, and I am living in modern times. You talk to me on the radio and ask me to bury the capsule somewhere, and then you go dig it...

Can you dig it?

He did not leave time for the author to interrupt, and went straight on: If we can dig it out, there is a paradox here. Teacher Tianrui, look, you live in the future, and I live in modern times. Your request is because, I

The buried capsule is the effect, so how could the cause occur behind the effect? ​​Isn’t this causal relationship reversed?

The author was completely immersed in thinking at this time.

And Bai Yang took this problem a step further in an even more absurd direction:

Teacher Tianrui, if you dig a hole on the lawn outside and then use the radio to notify me and ask me to bury a capsule in the same place, what will happen?

Did a capsule suddenly pop out of the empty pit?

The author is increasingly surprised.

This question is indeed absurd, but difficult to explain.

If I live twenty years later, facing a white wall, and use a time-travel radio to tell Bai Yang to draw a painting on the same wall, what will happen to the white wall in front of me?

Suddenly a painting appears?

I shook my head, saying that I couldn't figure it out and couldn't explain it.

We can only wait for Baiyang to decrypt it.

There is no need to explain. Bai Yang said, because this will not happen, the paradox will not happen, you live twenty years later, use the radio to notify me to bury the capsule, but you will not dig it, you dig a hole and let me

If you bury a capsule in the same location, the pit will not change, it will still be an empty pit.

According to this, if I live twenty years later, see a white wall, and then use the radio to notify you to paint on the same white wall, the white wall I see will still not change in any way?

I asked.

Yes, it's still a white wall. Bai Yang nodded, there won't be any changes.

Why is this happening?

The author is quite surprised.

The reason for this problem is the same as the reason why my first time slow delivery failed. Bai Yang sighed, he suddenly straightened up, and said to the author in a very serious tone:

Because it violates the second law of time.)

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That night, Banxia turned on the radio and waited until three in the morning before she went to bed. How could she sleep at such a critical moment?

She didn't want to wait for a moment.

The girl was lying on the table, wearing headphones, listening to the subtle current noise, just like sitting on the beach and listening to the boundless waves. In the boundless sea of ​​electromagnetic waves, Banxia stood on tiptoe and looked out. She hoped to see something

The mast of a small ship appeared on the horizon, and that ship would bring a message.

I don't know how long I waited until the familiar voice sounded on the channel, and Banxia suddenly became energetic.

The other party was breathing heavily, and without any nonsense, reported the location directly:

"At the end of the west side of the residential square corridor, under the central floor tile!"

Banxia took off her headphones and ran out.

At three o'clock in the morning, she took a shovel and a knife and got into the grass of Qi Ren. The square of Meihua Villa Community had long lost its original appearance. The corridor Bai Yang mentioned was also submerged by wildly growing weeds. The teacher had warned

She didn't want to dig in, because there were snakes inside, and the whole village was eating snakes, but Banxia couldn't care about that much, and all she could think about now was that floor tile.

The location provided by Bai Yang was accurate enough. Pinellia pinellia quickly found the turning piece and inserted the blade of a knife into the gap between the bricks. Sure enough, it was loose.

She was immediately pleasantly surprised.

The girl pried up the floor tiles with all her strength, then used the shovel to dig. The more she dug, the more excited she became. What could it be?

food?

But I don't lack food.

for drink?

Drinking it won’t last long, right?

drug?

As long as it's painkillers, give me more painkillers.

Banxia recited excitedly while digging down hard, but as she dug, she realized something was wrong.

I dug very deep, but found nothing.

Where's the stuff?

Did he get the wrong location? Or did he remember the wrong location?

Banxia started digging the surrounding floor tiles again.

I pried up the second floor tile next to it, panting and digging to knee-deep, but still found nothing but stones.

Dig the third piece again.

The fourth piece.

Banxia pried up the floor tiles of the corridor one by one, and then dug deeply with a shovel.

No.

No.

No.

nothing.

Why none?

That night, Midsummer frantically dug through all the floor tiles in half of the corridor. He was covered in mud and miserable, his hands and fingers were dripping with blood, but in the end he found nothing.
Chapter completed!