"On the night of Professor Wang's disappearance, he called you and we wanted to know what exactly he said to you. ”

In the interrogation room, Han Chao sat at the westernmost end of the square table, and at the east end sat 3 policemen, two men and one woman, led by a middle-aged man who frowned and asked Han Chao a serious question.

"I'm sorry. I don't know what you want to know, but I've answered this question three times. ”

"Student Han, please pay attention to your attitude, think about it carefully, you must know that any negligence and omission of your may cause us to lose the clue to find Professor Wang, don't you want your mentor to be found safely?"

"You know, we're not interrogating you, we're just trying to understand the situation. As if she had noticed that her words were a little more intense, the female officer immediately added another sentence.

"I said it, he asked me to revise the paper I wrote last week, and that's it. Han Chao said.

"You can't say that for 30 seconds?"

"What?" Han Chao was surprised,

The middle-aged policeman led by him pushed the glasses on the bridge of his nose and said: The sentence of revising the paper can not be said for 30 seconds, and the mobile phone we found from Professor Wang's bedroom has your call time, showing that your call time is 30 seconds.

After finishing speaking, the middle-aged police officer looked at Han Chao with a smug look in his eyes, thinking that he had a plan.

"Really?" Han Chao almost rubbed his head in pain.

"Hello Teacher"

"Well, hello"

"Did the teacher have dinner?"

"I just ate it, what about you, Han Chao"

"I've already eaten it too, thank you teacher for your concern"

"Is there something wrong with the teacher's call?"

"Oh, it's not a big deal, it's about your paper...... ，

"Is there 30 seconds" Han Chao asked helplessly, the middle-aged man's face was not very good-looking, and he snorted.

"If there's nothing important, I'm leaving, I still have classes in the afternoon. Han Chao stood up as he spoke, and walked towards the outside of the interrogation room without being stopped, and before leaving the door, the voice of the female policeman came from his ears again:

"Han Chao, I hope you go back and remember it again, Professor Wang's matter is very important, and if there is any mistake, your studies may be affected. Han Chao paused, a sneer appeared at the corner of his mouth, and he walked out without speaking.

Perhaps the reason for staying in the interrogation room for too long, the sun outside is a little dazzling, now the earth has rejuvenated, the poplars on both sides of the road have begun to pull out new shoots, a few precocious spring flowers are gently swaying in the wind, the warm spring sun is peacefully sprinkled on the world, and every passerby seems to exude a comfortable halo.

This atmosphere made Han Chao feel calm, and in this way, he shuttled among these light-footed strangers, making him feel the sense of earthly existence, and he was just a grain of mortal dust for all living beings, struggling for survival like them, running for beliefs, and chasing desires. His mind, which had stiffened in the gloomy environment of the interrogation room, began to come alive, and he couldn't help but sort out this bizarre thing.

On February 13, 2013, a major event occurred in the School of Archaeology, the famous Chinese archaeologist, Professor Wang Guojun, a leading professor in the field of pre-Qin archaeology, mysteriously disappeared in his home, three days before his wife and children returned to Guilin's hometown to visit relatives, so Professor Wang was the only one in the family.

According to Professor Wang's neighbors, at 5 o'clock in the afternoon, Professor Wang walked into the apartment from the outside, and Professor Zhao's 5-year-old daughter next door to Professor Wang said that she was playing at the door and heard the sound of the professor locking the apartment door from the inside, and then no one saw Professor Wang walk out of the apartment again.

At 7 a.m. the next day, Professor Chen, who often exercises with Professor Wang, went to call Professor Wang for morning exercises, and found that he couldn't open the door no matter how much he knocked on the door.

The on-site investigation found that the door was locked from the inside, as every household does before going to bed, the living room and bedroom were very tidy and there were no signs of fighting, and the windows were inserted from the inside without any signs of prying. The quilt in the bedroom was unfolded and half-lifted, which led to speculation that the professor had already been lying down and getting up again for some reason, but that didn't help much with the disappearance.

All in all, it's a well-sealed apartment where even a bird can't fly out, but a living person is gone.

The police officer who led the investigation was obviously a little overwhelmed by this strange scene, and immediately evacuated the unrelated crowd, ordered that no scene should be destroyed, and immediately called his superiors to report and request support.

Detectives and reasoning experts soon arrived, they checked all the corners, did not find the dark room, and did not find any traces of prying, only in the mobile phone on the left side of the pillow found that Professor Wang had a phone call that night, the duration of the call was 30 seconds, and the object of the call was Han Chao.

Obviously, so far, there is no clue about this case, and the only breakthrough is on that phone call.

Han Chao is a protégé of Professor Wang Guojun, which is well known in the School of Archaeology.

Professor Wang Guojun brought a total of 4 students this year, and only Han Chao's blue eyes were added.

But this is actually understandable, because Han Chao has an amazing intuition about ancient characters since he was a child, which Han Chao has never told anyone, when he was in high school history, there was a picture engraved with several oracle bone inscriptions, when Han Chao looked at these words, he actually felt what kind of meaning they should correspond to and the current Chinese characters, this feeling is a kind of grasp of the ancient life consciousness, and later verified that he really guessed several, this talent is not everyone has, it is simply born to engage in archaeology.

After following Professor Wang Guojun to study archaeology, Han Chao's archaeological talent unintentionally revealed made this archaeological master very happy, and he basically took Han Chao with him to investigate anywhere, in fact, there are some unknown secrets in any subject area, any discipline is all-encompassing, the more in-depth the study, the more mysteries and puzzles can be felt, archaeology is also such a discipline.

Professor Wang Guojun said to his students more than once: Human beings are often unaware of their own humility, and many times they think they are in control of many things, but sometimes they sadly find that the world deliberately makes human beings think that they control something, and this control may be an illusion.

Every time he said this kind of thing, Professor Wang's face would always be a little unwilling and helpless, and then he would smile with relief and self-deprecation: This is what I have learned for many years, you can listen to it, you don't have to take it to heart, young people still have to be confident.

Han Chao now walked to the main gate of the School of Archaeology, and the memories finally turned to the night of February 13th, the evening of February 13th was no different for Han Chao, after dinner, Han Chao scattered from the garden of the academy as usual, until the lilac mist slowly rose, and the world was shrouded in the unique tranquility after dusk, Han Chao paced towards the studio.

When Han Chao walked to the door of the studio, it was already completely dark, and at this time, Han Chao's phone rang, and Han Chao looked at the caller ID and it was Professor Wang.

"Hey, hello teacher. Han Chao smiled and picked up the phone, "Do you have dinner?" This was Professor Wang's first sentence, which also made Han Chao's nerves tense immediately, but then he thought that it might be a joke test from the teacher, it turned out that Professor Wang was very knowledgeable, in addition to archaeology, he also had a lot of knowledge in cryptography and archival science, so as his student, he also learned some cryptography knowledge from Professor Wang.

Cryptography is a discipline in which the rules of communication are agreed upon to carry out the secret transmission of information, because the rules are only known to the two parties, so the conversation between them may seem very ordinary to others, but the receiver of the information will obtain the real information after re-arranging it with the rules.

At that time, Professor Wang and several of his students explained the principles of cryptography in class, and agreed on a set of encryption and decryption rules in their small circle, and according to their agreement, when the first sentence is "no dinner", then the subsequent words will not only sound information, but the real information must be declassified with rules to obtain.

So Han Chao couldn't help but jump nervously when he heard the code words, but he thought it might be Professor Wang's test, so he communicated with Professor Wang, the conversation was only 30 seconds, Han Chao didn't notice any abnormality in Professor Wang's voice, and the information on the bright side was also very bland, after a brief greeting, he asked Han Chao to revise last week's paper, and then the phone hung up.

Han Chao didn't take it to heart, and he didn't even start deciphering the information immediately, because deciphering needed to reorganize the information according to the rules, which would take some time, and he still had an important paper to deal with, so he planned to decipher it before meeting Professor Wang the next day.

But the next morning, Han Chao learned the news of Professor Wang's disappearance, when Han Chao felt a tingling in his scalp, he knew that the professor's previous phone call was by no means a test, but something to be transmitted, after a short panic, Han Chao immediately calmed down and deciphered the work.

"The third word of the first sentence", "The fifth word of the third sentence"...... , Han Chao didn't dare to use a pen, he struggled to combine the information in his memory, and finally restored the professor's information, with only one sentence: protect the key, the second world of the website, don't tell anyone, remember!

Han Chao repeated this sentence repeatedly from the bottom of his heart, and he was stunned for a while.