After entering the second elevator, when the elevator doors closed, suddenly the voice system in the elevator began to work: "Hello, please swipe the card, and at the same time please enter the password." ”

Wang Ren took out his ID again, inserted it into a card slot on the side of the elevator floor, and entered the password. The elevator voice system immediately responded: "Third-level Superintendent Wang Ren, the identity verification has passed." Where to go, please? Wang Ren said in a straight voice: "5 floors underground, ten offices." The voice system in the elevator immediately responded: "Confirm." 5 basement floors. And it got running.

I opened my mouth in surprise! In this humble place, there are 5 underground floors! It's a bit like the feeling of the underground secret base of the Umbrella Corporation in "Resident Evil"? No wonder these are the ten mysterious places, it's really not simple.

After Wang Ren took me to the 5th basement floor, the elevator opened. Walk in and it's very big inside! It's unimaginable! At the door stood two SWAT officers with guns and on guard. And inside, there are a lot of people coming and going. In the center is a huge TV screen that displays numerous camera shots. In front of the computers, many people in police uniforms were busy staring at the monitor screens.

And there are many other rooms, where many people in police uniforms are seen coming in and out, offices, and conference rooms. The whole hall seems to be very busy. I've been to the 110 Command Center of the City Bureau and seen a busy scene there. And here, it seems to be a copy of the 110 command center. It's just that the area is even bigger!

Wang Ren took me into a room, poured me a cup of coffee, told me to wait, and left. Taking advantage of the fact that there is no one now, I carefully arranged a large number of furnishings in the room: a very simple conference room, but all kinds of video equipment and electronic projectors in it show that it is all high-tech equipment. It seems that the 10th Division is a very important department, and the funds are sufficient.

I can't afford to think more. The door to the conference room opened again, and Zhang and one of his female team members entered. Zhang Chu came over to shake my hand very warmly, and took the initiative to say to me: "Xiaofei, is the injury better today?" I'm sorry to ask you to come to us once. ”

Seeing Zhang Chu so polite, I was also very embarrassed. Immediately replied to him: "Where, where." I asked for it on my own initiative, after all, the stakes are important, and it is better to make it clear in person. Everyone exchanged a few words of greeting and sat down according to the position of guest of honor. I sat face to face with Zhang, while the female team member sat on the side, opened the laptop, and I understood that she was in charge of recording.

Zhang Chu said straight to the point: "Xiaofei, all the content of our conversation today is top secret. It must not be leaked, so sign a confidentiality agreement. Oh, by the way, I forgot to introduce, this is Xiao Liu, Liu Xiahua. You should have met her yesterday at the scene, she is my secretary and is also in charge of some of the administrative chores of our 10 divisions. Today, she is responsible for recording the entire conversation. That Liu Xiahua immediately smiled at me, and I smiled back at her. It's not very pretty, but it's very innocent, well, I immediately feel a little good.

Immediately afterwards, Zhang Chu said: "Again, all the content of our conversation today is top secret. You told me on the phone yesterday that there is key evidence and discovery in Professor Wang's case. And asked to talk to me face-to-face, for fear that it would not be safe. Zhang paused, took a sip of water, and then continued: "In view of the situation of your attack yesterday, we specially asked you to come to our ten offices today. In this place, there must be a certain level of people on one side to enter. But you're in a special situation, so let you come here. It also shows the trust that the Force has in you. Everything here, you have to keep it a secret, and you can't talk nonsense outside. This is important! Then, as soon as the conversation changed, Zhang Chu immediately said: "Don't talk nonsense." What are you looking for me today, and now that you're here, you can rest assured that you can tell me, right? ”

Nervous, I picked up the coffee on the table and took a sip. Well, freshly ground cappuccino, not bad. Then he put down the cup and said to him: "Zhang, I want to ask first, have you found the book in the Fudan Library now?" Did you find anything? I beg your pardon, I'm not a sellout. It's just that this involves one of my conjectures about this case. If I now know the whereabouts of the book in the library and the investigation, I am sure I can confirm my suspicions at once. At the same time, my conjecture can be confirmed as an important clue in this case. Therefore, caution has to be taken. ”

Zhang Chu nodded approvingly: "Xiaofei, you are a community policeman, but you can take the initiative to think about the case, yes, sure enough, the tiger father has no dogs." In my opinion, in a few years, you will also be able to become a criminal policeman. Then he immediately turned to Liu Xiahua and said, "Xiao Liu, tell me about the book donated by Professor Wang of Fudan Library." ”

Liu Xiahua sleekly opened the document from her laptop, and then said, "Zhang." According to a colleague who went to the library to pick up the book, the book had not been in the Fudan library for a long time, because it was placed in a remote corner, and no one paid attention to it. Therefore, there is not a single borrowing record. Our colleague took the book back. On the surface, the book is very new, and no one has ever looked at it. Then, Liu Xiahua opened another document on her laptop and continued: "My colleagues in the laboratory department, after the preliminary technical inspection, determined that this book, like the eight books found in Professor Wang's house, was put on the assembly line at the same time. It should be in those ten books. ”

I immediately asked Liu Xiahua: "Then may I ask, in the book, did you detect anything special?" For example, Professor Wang wrote the code, wrote the words inside, or... I deliberately accentuated my tone, emphasizing, "Clipping paper or something." ”

Because of my serious tone. Liu Xiahua was very nervous, and carefully looked at the entire inspection report from beginning to end, and then replied to me very firmly: "No, the colleagues in the laboratory department have not found anything about the situation you said." That book is just an ordinary book. ”

My conjecture seems to be correct! I paused, trying to gather my thoughts. Zhang Chu looked at me with interest, but still waited for me.

Finally, I said, "Now, the only clue that seems to be the last thing is the last remaining book. That's right, the book Professor Wang gave me. However, as everyone knows, the book was snatched away after I met that mysterious man yesterday. Now preliminarily, the situation is very unfavorable for us, and the book is gone! ”

I paused, carefully took the piece of paper from my bosom. That's right, it was Professor Wang who was sandwiched between the books, and I put the paper on the computer desk casually. I said, "The clue that Professor Wang wanted to tell me was not actually in the book that was given to me. Because, that book, like the other nine books, is just a cover! ”

As soon as my words came out, Zhang Chu and Liu Xiahua immediately asked in surprise: "What! Is that book useless at all? Then why did he draw the pattern of his book very hidden under his corpse before he died? ”

I smiled slightly, took off my glasses, and slowly said eight words: "Ming Xiu plank road, dark Chen Cang!" ”

"What!" Zhang Chu and Liu Xiahua were shocked again! Zhang Chu immediately seemed to understand something, and hurriedly asked, "Could it be that this piece of paper... ”

I looked up and said, "That's right. This is a chain of clues, one link after another, only by mastering the right clue, can we know the next clue. This second clue is not the book at home, but the piece of paper that Professor Wang sandwiched in the book! ”

I slowly opened the paper and pushed it in front of Zhang. It turned out that this was a letter written to me by Professor Wang before his death!