Seven years ago.

Gliese 581, an impermanent star, a rocky planet with a race called humans, is in full swing to develop a huge spaceship called "Kunlun Mountain" to make the final preparations for its own voyage plan.

Everyone is working hard for their goals......

On this day, Professor Li Zhi, who was in charge of astronomical observations, suddenly detected an unusual fluctuation.

It was a regular burst of radio waves, very faint, but endless.

He frowned and checked, a little skeptical that this burst of radio waves was a fragment of a neutron star's pulse. In fact, the vast majority of the signals detected by the observatory are emitted by these neutron stars or very distant supernovae, and these signals do not have much meaning.

After a while, this series of pulse bands actually appeared again, and it was the same law!

After staring at the screen for a long time, Professor Li suddenly realized something and yelled at his assistant: "Hurry up and record, record everything!" ”

"Retrieve the source of the signal!"

In order to cultivate the public's interest in foreign exploration, astronomy, including cosmology, has been a key project supported by the new civilization, and many students have interned here.

And the search for signals from extraterrestrials, including those of Earth's civilization, is a top priority.

Though...... There hasn't been much progress. It is estimated that the real alien civilization has long used electromagnetic waves for communication.

The young students pondered the radio waves. Because it is very weak, the signal is missing a lot, but there is a certain pattern faintly.

"It's so regular!"

"It's a string of signals, real signals from civilization!"

"Don't get excited, try to decipher it."

Professor Li had a hunch that this was absolutely remarkable.

Immediately afterward, he heard the observation room next door also start to revel, and it was clear that both sides had made a common discovery.

"Again! Another string of signals! One of the boys exclaimed.

I saw that the radio telescope detected a large number of information codes!

More and more, more and more, and it went on for hours!

This time it wasn't like it used to be, with only a few sentences, but a whole ......

103 trillion!

One hundred and three trillion!

A few hours later, while the supercomputer was analyzing and deciphering the data that had just been detected, Professor Li excitedly knocked on the door of the next room and pretended to be calm: "Old Guo, it seems to be a great thing." ”

"What's the matter, have you found out, is it a signal from the earth's civilization? Or an alien civilization? I'm more interested in the signals of extraterrestrial civilizations. ”

Lao Guo's face was also flushed, and he said fanatically: "No, it's definitely not the earth civilization, because it's not in the same direction at all, and a thousand percent is not...... Instead, I suspect that it was the humans on the golden sun who sent us the signal. ”

"Golden Sun?" Professor Li was stunned for a moment, then patted his head, and almost forgot that there was such a thing.

"Yes! This string of signals is likely to come from - Captan Star! ”

The report was quickly passed back to the captain's office. Because it uses a traditional remote error correction code, it is easy to decipher and come out.

When he heard about this, even Zhang Yuan was taken aback, and soon became excited.

"Have the humans of the Golden Sun also arrived smoothly...... No, theoretically they should have arrived faster than we did. ”

"Let's call an emergency meeting!"

At the same time, he gave several more orders.

"Maximize your astronomical observation equipment and don't miss a piece of information."

"Call the reporters too."

……

Ten minutes later, the conference room was already crowded with people, everyone was talking excitedly, and there was a frenzied atmosphere in the air.

In particular, Li Zhendong is a mess of excitement, and a group of physicists are frantically discussing strange words such as so-called "graviton" and "cosmic strings".

All in all, this news can be said to be the best news about humanity itself for almost a century!

Having said that, the branch of the Golden Sun does not actually belong to the Earth civilization itself, but another brand new civilization.

But when you think of the boundless universe, in the distant planet Captan, there is another active and vibrant branch of humanity, is there anything more to look forward to and celebrate in the world?

Zhang Yuan didn't sell it, and directly played the translated letter on the screen.

“…… Dear Earth Times, hello, this is the Golden Sun, repeat for the seventh time. ”

“…… Dear Earth Age, this is the Golden Sun, repeating for the eighth time. ”

……

“…… Dear Earth Age, this is the Golden Sun, repeated for the hundredth and sixth time. ”

This sentence was repeated 107 times, which made everyone present a little impatient, and it was not until Professor Li of astronomy explained it later, and everyone was quiet again.

The reason is that ultra-long-distance electromagnetic wave communication costs a huge amount of money, and it is impossible to notify the other party in advance that we are going to send a message, so it is necessary to give the other party a preparation time. Only this kind of repetitive information can attract the attention of the other party.

Otherwise, this piece of information is likely to be ignored and never received again.

"I see." Ye Kaifu, who was sitting at the bottom, nodded.

After repeating it 107 times, I finally got to the point.

"Hello colleagues of the Earth Age, this is Captan, the branch represented by the Golden Sun spacecraft, and I am Xu Peng, the captain of the ship at the time."

"Our civilization has been developing here for 544 years, and it is necessary and obligatory to report these 500 years of history to you in the Earth Era, so as to better plan your future."

The tone was heavy, and everyone couldn't help but hold their breath.

The two civilizations have adopted almost the same strategy, that is, guided by the "historiography of the new civilization", but there will be some differences in the minutiae of policy.

Because the histories of the two civilizations are not the same. Earth Age has encountered many, many stories, and the Golden Sun must have encountered a different story.

Due to the different development history, the ideology of the people, and the culture of the whole society will be very different.

This is the complexity of a civilization, even if both sides are all human and are of the same origin, there will still be a great degree of difference.

In the process of development, a series of small problems have arisen.