Sunrise and sunset......

Heaven and earth are yellow, and the universe is desolate......

Spring, summer, autumn and winter, the seasons change......

Yuan Fei remembered that he was tired and fell asleep, but he didn't expect that he was in a strange place now, and a lot of messy words appeared in front of him, and these words were fluttering in front of his eyes, which should be ......

Dream that, right?

This dream is so strange, Yuan Fei can actually know that he is dreaming, this is simply ......

But suddenly, I saw Cheng Lao, this guy was wearing clothes from an unknown dynasty at this time, with white hair and white beard, what was he going to do?

"Ten! Ten is right! Five during the day, five at night, how nice! Haha......"

Ten? What does this mean?

But soon, the old man seemed to change again, and even questioned himself. Pen % fun % Pavilion www.biquge.info

"That's not right! A hundred! It should be a hundred! ”

Hundred?

But this is not over, I just heard that the old man seemed to change his outfit again, and then said.

"Nope! Sixteen! Sixteen! ”

But this ......

"That's not right! It's twelve! Twelve is right! ”

Sixteen? Twelve?

What the hell is this old man up to? Is he crazy?

Yuan Fei was really incomprehensible, but suddenly, the old man changed his clothes again, this time it was interesting, it turned out to be an ancient official uniform, and this old guy was still wearing an official hat on his head!

I saw Cheng Lao looking at something, and then shouted for the rest of his life, "Ha! It's time, noon! ”

Noon?

Hearing this, Yuan Fei immediately ran over to take a look, and when he saw it, he immediately understood!

The thing that Cheng Lao was looking at was a wooden pole, but at this time, the shadow of this pole was extremely short, almost overlapping with the pole, and Cheng Lao saw Yuan Fei and pointed upward......

Sun!

Noon, of course, is the time of the sun. At this time, Yuan Fei somewhat understood, that is, the things that Cheng Lao just said, it is likely that they are all time, that is, the development of our timing.

10 hours, 100 engravings, and even 16 hours, to the later 12, these are all timekeeping methods that have appeared in our history, but why did Cheng Lao tell himself about this?

Of course, Yuan Fei didn't forget the matter he discussed with Cheng Lao before, that is, time on this xn7693 planet passed very quickly, so now Cheng Lao showed himself these ...... It's all time! But these ......

Yuan Fei still doesn't understand, but Cheng Lao is interesting.

Woo~Woo~

"This is the Greenwich Time Train, sir, would you like to get on the train?" Cheng Cheng became the conductor and beckoned Yuan Fei to let him come up, a proper old driver......

It's really interesting, a steam train appeared in front of Yuan Fei's eyes, this ...... My own dreams, naturally, I can do whatever I want. Of course, Yuan Fei didn't forget what Feng Luan had said before.

"Old man, should I kill you now?" Well, what Cheng Lao is doing now is to communicate with Yuan Fei spiritually.

But Cheng Lao laughed, "Haha...... You kill it, it's okay, the old man is not a human in the first place! ”

That's right, this old man is not a human, he is an immortal, and he is still a stinky and shameless kind!

"I'm not kidding you, what the hell are you going to say to me?" Yuan Fei didn't beat around the bush anymore and went straight to the point.

"Boy, the old man is inspiring you!" Cheng Lao smiled again, and then a lot of things appeared in an instant.

Eastern Time ......

Falakfurt Time ......

Tokyo Time......

In the end, what was particularly interesting was that just listening to the sound of his throat, Yuan Fei's eyes changed again.

"Lamb skewers! Lamb skewers! "Cheng Lao, this guy is wearing a small hat, wearing a young man's robe, and speaking with a lame accent, barbecuing there!

"You, you ......" Yuan Fei wanted to scold, what kind of Avanti are you pretending!

"Aha, I'm Uncle Avatar! My lamb skewers, it's just, tsk...... "This old man is quite into the play."

"......" Yuan Fei's expression ......

It's just that this is roasting and roasting, and the old man looks at his watch, "Hey! Our sun has set! ”

This is...... The time shown on this watch is, 9 o'clock!

At this time, Yuan Fei's mind seemed to burst out of something, and he only heard him say: "Cheng Lao, what you want to say is that the definition of time is different?" ”

"Aha! You kid is really good, not bad, hahaha......" Cheng Lao laughed and pointed at Yuan Fei with the mutton skewers in his hand.

In an instant, the picture in front of him seemed to disappear all at once, and at this time, Cheng Lao was standing in front of Yuan Fei, and the two of them seemed to be in the universe, with countless stars floating around them!

"Boy, did you think of it?" Cheng Lao still smiled like that.

"......" and Yuan Fei, his brain was running rapidly at this time!

My definition of time is different, it has been changing historically, in the past, human beings looked at the sun, just like sundials, in this way, each region has its own time, and now, the people on this planet are also human beings, and the time they are in now is much faster than ours, but this is different......

"Is it just a definition?" Cheng Lao's voice came again.

Yes! Is it just a definition?

Yuan Fei naturally thought of the example mentioned in "A Brief History of Time", that is, if you let a pair of twins live on the high mountains and the other on flat land, then the two people will appear one old fast, the other old slow, and the old one on the high mountain will be faster.

In addition, two identical, very accurate bells are placed on the top and bottom of the water tower, and the one below is slower.

Obviously, even on Earth, time itself is different, and we humans continue to define our time.

Cheng Lao shows these are all kinds of definitions of time in human history, we used to look at the sun, and then there were timekeepers such as clocks, but even if there are clocks, there is no complete unity of time, such as Eastern Time in the United States, in addition, from ancient times to the present, the meaning of unit time is not the same.

In ancient times, human beings had almost no feelings for a second, because they couldn't do anything at all, but later, on the earth in the 21st century, that second can be long, killing an opponent on the playing field, killing a person with a firearm, and the amount of transactions in the stock market in one second, it is scared to death!

"This planet, the time of xn7693 itself is different from that of Kiba!" Yuan Fei said.

"That's right, so ......," Cheng Lao continued.

"So, this planet is an experimental star!"

"Aha! That's right! ”

Cheng Lao clapped his hands happily, but at this time, Yuan Fei was not very excited, but he fell into contemplation again!

The derivation just now, in fact, is very simple, that is, to start from the basic situation, let's say that Kiba Star, which is a polar terrestrial planet, then the definition of this 'similar to the earth' is naturally that there is an atmosphere, water, and vegetation...... But now, there should be one more condition, and that is......

Time is similar to Earth!

Yes, what a simple truth, but this truth was ignored by Yuan Fei, and even Yuan Fei was sure that most of the people on Kiba Star ignored it.

Well, if this time is similar to that of the Earth, a very interesting conclusion can be drawn......

At this time, the level of human science and technology can already allow human beings to live in the Kiba Star 2.6 million light years away from the earth, then, with the size of the original Milky Way and the current size of the Andromeda Galaxy, then this kind of star carries planets, and then the planets have the conditions for survival, there must be many such planets.

However, these planets are likely to have problems with timing!

It's either fast or slow, Yuan Fei still remembers a classic science fiction movie, which has been remade many times, called "Interstellar", in which there is a planet full of water, and the time of that planet is ......

Thus, these planets became experimental stars, such as this XN7693, but there is one condition for this derivation, and that is ...... The polar-terrestrial planet is unique!

By the way, it is the time of Kiba, which is similar to Earth time...... Yuan Fei knew very well at this time that it could not be exactly the same, there could not be two identical planets in the universe, and the time on them could not be exactly the same.

But!

If there is a problem with this premise, it is that what if there is more than one planet with a similar time to the Earth?

The idea...... I don't know why, Yuan Fei has an inexplicable fear!

If there are polar terrestrial planets other than Kiba, then they must not be experimental stars, then they are similar to Kiba stars, but ...... Why don't we people of Kiba know about it?

Could it be ......

Yuan Fei felt that other polar planets should exist, because this is a vast universe, the Milky Way is more than two million light-years in size, and the Andromeda Galaxy is almost so big, so big, and such a vast star field, how can there be none?

"Boy, it's already very good that you can comprehend so much now, although you still haven't comprehended the key essence, but it's okay, don't think about it anymore." Cheng Lao's voice appeared again, interrupting Yuan Fei's thinking.

"Cheng Lao, can't you tell me directly? Can't you explain the final answer? Yuan Fei said helplessly.

"Boy, you have to understand it yourself, because only this is the best and most meaningful ...... for you" Cheng Lao finished speaking, he seemed to be a little distracted, and then said, "Hehe, now even if the old man wants to explain, he can't do it, hehehe......"

This......

Yuan Fei wanted to say something, but suddenly, he only heard a harsh voice in his ear.

Beep! Beep!

"Hint: The star rating task has changed, the star rating team of Black Iron Star is about to land in XN7693, the original tasks of each class of Kiba Star remain unchanged, and at the same time, the competition with each class of Black Iron Star is pursued, and the principles of fairness, justice and openness are pursued, and the two sides must ...... each other"

This is what Yuan Fei's badge gives, and this ......

Black Iron Star?

Yuan Fei's heart was surging at this time, because of the time problem he had just thought about himself, and he was ...... with this Black Iron Star