The next afternoon, when Wang Yinan came to the office, Li Wenjing and Zhao Keqin were already sitting in front of the terminal early and waiting for the results of the calculation.

And there was an uninvited guest in the office.

"Why are you here", Wang Yinan looked at the old acquaintance in front of him and said very unexpectedly,

"I feel frightened in Shudu, and I always feel that you will find something amazing today", said with a smile.

"I haven't slept much all night, so I bought a plane ticket early in the morning."

"It's still very early, today at most we can only reconstruct a signal with higher accuracy, as for the content of the signal, I don't think it's so easy to crack", Wang Yinan is not as optimistic as anyone who came.

Everyone should have guessed who the person is, Chief Yang nodded, "That being said, it's more reassuring to always watch the scene by yourself."

Wang Yinan made a cup of coffee for Chief Master Yang, and the two sat on the sofa in the office, chatting with each other, waiting for the results of the Gödel system.

"Drip, drip, drip". The buzzer sounded, and Chief Master Yang jumped up faster than Wang Yinan, walked to the terminal in three or two steps, and began to output a bunch of results on the screen like rain.

When the terminal output is almost over, a group of people stand in front of the terminal, you look at me, I look at you, they are all looking forward to it, but they seem to be worried that the result will be disappointing, or Wang Yinan stood up, "Let me see the reconstructed data", Wang Yinan opened a piece of waveform data.

"There doesn't seem to be anything special", Zhao Keqin looked at it for a long time and said,

"There is no reference, of course there is nothing special", Wang Yinan patted his head, "If you can see something from this, then you can find a chance to learn from someone who pretends to be a ghost in the future."

After speaking, Wang Yinan called up the original sent data, although the accuracy is not high enough, but because there is no sampling, it can be considered that the strength of the signal is continuous, so after amplifying the accuracy, use the program to smooth it, and what you get should be the signal that is accurately transmitted.

Compressing the transmitted signals on the timeline so that the timescale is exactly the same as the data reconstructed by the Gödel system, Wang Yinan wrote a script to display the sending and receiving signals at the same time on the screen at the maximum scale.

After typing the command to execute the script, a smooth theoretical transmission data waveform appeared on the screen, and the reconstruction signal with a lot of glitches, the smooth theoretical waveform ratio was automatically adjusted, and then it was consistent with the reconstruction signal, and the two curves completely coincided.

"Remove the original data and only display different values", Wang Yinan said as he knocked down a few more sentences of script.

After a few minutes, a histogram of highs and lows with obvious regularity appeared on the screen.

"The last step is to normalize", Wang Yinan takes the maximum average difference as the maximum value, normalizes all the data proportionally, and after typing in a few new lines of script, Wang Yinan executes the normalization code.

A few minutes later, a miracle did happen, and the data appeared on the screen with obvious regularity, which at first glance was artificially generated and could not be just background noise or error or something.

"The next thing is your job", Wang Yinan said to Li Wenjing and Zhao Keqin,

"I don't believe that there is no highly intelligent civilization behind this", looking at the obviously organized data on the screen, Chief Yang sighed.

"First of all, figure out how the signal is encoded," Li Wenjing said.

"I think it's better to see what kind of signal this is, Wang Yinan said, why don't we use the speaker to listen to it?" This crazy proposal was immediately approved by everyone present.

"Hurry up, listen to the voice from the extraterrestrial",

"I'm going to sit a little closer than you and be the first blue star to hear an alien voice",

"Maybe it's a brainwashing divine comedy, will we open Pandora's box by playing sound?" , Zhao Keqin's brain hole is big enough,

"The sound that is then played can control our minds and thus clear the way for an alien invasion".

"I think you're science fiction, oh, no, I've seen too much fantasy", Li Wenjing expressed his contempt for Zhao Keqin while connecting the speaker to the computer.

When the data was converted to a familiar frequency and played, it was as if there was a sudden heavy rain in the office, with the sound of raindrops, wind and waves like waves crashing on the beach.

"But it doesn't seem to be the same as the sound of nature."

"At least we can be sure that the signal is not the voice of an alien speak," Mr. Wang said.

Turn off the speaker, "Do you remember the gift to the aliens that the traveler carried", Wang Yinan asked,

"Of course I remember", this time Zhao Keqin replied first, "There are gold plates, which are engraved with patterns about human beings and our civilization, as well as records, which are our music and greetings, etc."

"That's right, but what we're receiving now has no substance, it's a pure signal, and it's attached to the signal we send," Wang said.

"Let's put ourselves in the shoes of what we want to do if we want to attach our information to the past in such a way?".

"Moreover, we don't really want the other party to know about our existence, or to meet certain conditions to let the other party know about our existence," Li Wenjing added.

Chief Master Yang nodded, "At least judging from the discovery of this laser black hole, this unknown civilization doesn't really expect us to discover their existence, or rather, doesn't want us to know their existence so easily."

"Is it understandable that this is most likely an exam?" , Wang Yinan began to open his mind again,

"Only when we understand what they are saying and answer their questions will they feel that humans are qualified to communicate with them?"

Wang Yinan's words caused a burst of contemplation, and I have to say that although this idea seems ridiculous, but if you think about it carefully, it is unexpectedly very reasonable.

With the exam, you can explain the sudden appearance and disappearance of this regular hexagonal laser black hole, the question has been given to you, only through this exam, it is possible to exchange for the possibility of contact.

Or even just the possibility to see the next question.

"Millions of answers", Li Wenjing muttered, "It's really similar",

"If you think about it from this perspective, then this signal is likely to be the topic of the next question," said Mr. Yang.

"What could it be?" ，

"Let's start making reasonable assumptions," Wang said.

"First of all, there is reason to believe that this hexagonal black hole appeared on its own initiative to contact us",

"And it's very likely that they came into contact with us after discovering the lidar signal we emitted," added Chief Engineer Yang.

"Being able to emit a lidar signal proves that our civilization has a certain level, that is, it is likely that this is an entry standard, and only when we reach such a level of civilization can we be eligible to take the exam," Li Wenjing said.

"It makes sense, and it explains why there have been no similar reports of human existence for so many years," Wang Yinan said.

"Next, the purpose of this question is likely to be to test our comprehension, that is, at least whether we can understand it."

"It won't be too complicated," Li Wenjing said, "after all, the degree of development of civilization, the direction of emphasis, and even the expression of language and writing are completely different, and it is impossible to have very complicated topics to examine us."

"In fact, we can see that the current topic is already cheating," Mr. Yang added.

"Because according to the normal level of science and technology, we can't find the content hidden in the time details, we actually use more than 30 devices to improve the time accuracy by an order of magnitude, and then we find these details."

While speaking, Chief Master Yang gave Wang Yinan a thumbs up.

"But you can't decipher these things, everything is in vain", Wang Yinan pointed to the screen, his face full of helplessness.

"The specific decipherment must rely on the Gödel system, but artificial intelligence is certainly not as smart as humans in discovering clues, which is the only advantage we have over machines."

"We don't have a clue ourselves, and it's impossible for the Gödel system to find the key."

"It won't be like in science fiction movies, first 1,2,3,4...to 10 means that we are decimal, then send primes, and then the positions of celestial bodies, etc.", Zhao Keqin continued to open his mind,

"Probably not, this civilization has appeared on the Blue Star, which proves that they should have a certain degree of understanding of our civilization, so these vain things should not be needed", Li Wenjing immediately retorted.

"I still can't go far, it's more reliable to return to the topic of exams," Wang Yinan said.

"By the way, didn't that witch see me staying with this hexagon, you have to ask her what else she saw", Wang Yinan suddenly remembered Yang Lihan who he met during the dinner two days ago,

Just do it, he picked up the phone and dialed the phone left by Yang Lihan last time, the phone was quickly connected, and Yang Lihan's voice appeared quickly, "Professor Wang, are you in trouble?" ”，

"Tell me quickly, have you seen anything in the past two days", Wang Yinan couldn't wait to ask,

"I really dreamed that you called me," Yang said.

"And then, then what did you say", Wang Yinan then asked,

"I seem to have said that you should go to the movies, "Pirates of the Caribbean" is good, and hung up the phone",

Yang Lihan was obviously about to do the same as in her dream, and she immediately hung up the phone.

"Pirates of the Caribbean", "Captain Jack, this is the rhythm of the gods", Wang Yinan put down the phone, and the whole person was confused.

A few friends also looked blindfolded, "Pirates of the Caribbean", "What is this?" Mr. Yang asked,

"Who are you consulting, are you reliable?" ，

"Witch", Wang Yinan replied succinctly,

"Two days ago, when I was eating, she said that she saw me and the hexagonal black object, and she saw a lot of messy symbols."

"So awesome?!" , Chief Master Yang was also a little stunned, "Few people know about this matter."

"That's right, this witch claims to be able to see clips of the future, anyway, I've dealt with her a few times, don't say it, she has a nose and eyes, it's like that every time."

"Then what does this "Pirates of the Caribbean" mean", Zhao Keqin also began to mutter,

"Why don't we go to the cinema and watch a movie?" , Zhao Keqin finally put forward a more reliable proposal.

"It's really not good, so it's the only way to do it", Wang Yinan took out his mobile phone casually, opened the Dog Eye app, and began to search for the latest video news.

"Pirates of the Caribbean" is in its fifth season, and it is about the amateur astronomer Karina looking at the stars, and it seems that there is an island in the direction of the stars? Karina has a journal and the diary itself is a treasure map with a key on it? Ruby?

It's a boring plot, far worse than Wang Yinan's story, and the protagonist began to complain again, but a word in this movie introduction attracted his attention.