After three days of rest, Chen Jieyang did not come to disturb Yu Fan, although he had a new case to communicate with Yu Fan.

Yu Fan didn't go anywhere, just tidying up the house at home, running in the community, reading books, and listening to soft music.

Although his body is on vacation, Yu Fan's brain is not idle at all, when he is fine, he takes out the strange "sulfur atom electron shell" diagram and looks at it, looking at it positively, looking at it backwards, looking horizontally, and vertically, he still can't see any clues, Yu Fan thought about it, and only saw if he could find clues from the courier brother who sent him the courier.

Today is the last day of the holiday, and Chen Jieyang sent a WeChat message very early: "Old Yu, are you free tomorrow?" Let's meet and talk, there are some situations I would like you to refer to. “

Yu Fan thought for a moment and replied: "I'm not free tomorrow, the company has important things, let's go back and talk about it." Right now, Yu Fan just wants to figure out this prank, because this matter has been bothering him for a long time.

The next day was the first day of work in the New Year, and there were a lot of cars on the road, but this did not affect Yu Fan, because he walked to the company every day, not because he had to walk fast, but because Yu Fan liked the process of walking, in which he often thought about problems, and many sources of inspiration were also realized from the process of walking. Many of the unique formulations were also conceived on the way to the lab, not born in the lab.

Just as the scriptures are learned in the west, the true scriptures are not actually in the west, but on the way to learn the scriptures.

When they arrived at the company, everyone's faces were filled with happy and busy expressions, everyone greeted each other warmly, chatted about where to go during the holiday, and then quickly dealt with the things at hand and started a busy day.

Yu Fan found Cao Ben, and after a few greetings, he went straight to the point: "Old Cao, how is the express delivery I asked you to show me that day?" ”

Obviously, after a few days, Cao Ben seemed to forget about it: "Huh? Belch...... Express delivery? Oh, I remember, you asked me to check who came to the company the other afternoon, right? Well, there was a courier deliverer, and there was no one else. ”

Yu Fan: "What about the express?" Can you help me find out who sent the courier? ”

Cao Ben scratched his head embarrassedly: "Oops, I forgot about this, it doesn't matter, the couriers are in the express box at the door, just take a look." ”

Yu Fan jokingly knocked Cao Ben's head and ridiculed him for being forgetful. However, it is also understandable that before the holiday, people are absent-minded, the body is in the company, and the heart may have flown home.

The courier box was opened, and there were five courier documents lying inside.

But the interesting and strange thing is here again, the express time of the four couriers inside is sent during the holiday, only one courier does not know, because this courier bag is very special, the color on the courier bag is white, as if it has been blistered, and what is even more strange is that the courier sheet that was originally pasted on the courier was a piece of white paper of Zou Baba! There is no sender, time of delivery, address, and no information.

Cao Ben wondered: "Hey? What's going on with this courier? How come there is nothing? ”

Yu Fan asked Cao Ben: "Has anyone touched the express box in the past few days?" ”

Cao Ben: "It's impossible, the key to the express box is in my hand." ”

Yu Fan reasoned: "So, this Sanwu courier should have been sent by the courier brother you said that day?" ”

Cao Ben nodded: "It should be so, but there is nothing on this express, how did he send it?" ”

Yu Fan smiled lightly: "Oh, that's it, then this should be an advertisement, it is estimated that it is to sell a house, get a fitness card or something, it's okay, you go and get busy." Yu Fan made up a pretense to get rid of Cao Ben, he didn't want innocent people to be implicated in this "prank" that he didn't know what the situation was.

Cao Ben nodded and went to work.

Yu Fan took this document bag into his office, closed the door, put the express document bag in the middle of his desk, and looked at it carefully for a while, isn't this courier brother delivering couriers? Is it disguised as a courier, to throw such a blank document bag, and then the real purpose is to infiltrate the company and stuff the paper with that weird pattern into the bag that Yu Fan wants to bring to BJ City?

The more I thought about it, the more I felt that this courier brother was suspicious, but the more suspicious it was, it proved that Yu Fan was getting closer and closer to the truth, which couldn't help but make Yu Fan excited. It feels like we are looking for a treasure chest in the sea that sank a hundred years ago, and with our efforts, we finally found the treasure chest, although the treasure chest is locked, and we can't get the treasure for the time being, but our goal is clearer than before, and all we need to do is to open the lock. The truth is about to be revealed.

Yu Fan rubbed his hands, rubbed his hands hot, and put on an experimental nitrile glove, he wanted to see what was in this document bag. Yu Fan carefully pinched the opening strip of the document bag with his hand, this document bag did seem to have been blistered, and the paper became very soft.

With the sound of "hiss", the seal of the document bag was torn open, Yu Fan carefully opened the file bag, and as soon as he opened the file bag, there was a pungent smell, and Yu Fan had to turn his head and take a breath of air. Continuing to stretch the opening wide, Yu Fan saw a piece of paper lying in the file bag, yes, only one piece of paper.

Yu Fan put his index finger and middle finger into the document bag, carefully twisted out the paper, this paper is not big, and with the other hand, he took out an A4 paper and put it on the table, and then put the twisted paper on the A4 paper.

Yu Fan took a closer look at the document bag, there was nothing in it, Yu Fan tore the side of the file bag again, and completely spread the file bag into a plane, wanting to take a closer look at whether there was a mystery in it, but at present, this is an ordinary document bag, except that the color on it has fallen off, nothing special.

Yu Fan put aside the document bag and began to carefully study the paper that was taken out. It is an almost all-white piece of paper with a slight pink stamp on it, and there are 10 round holes on each side of the paper, evenly round holes.

Yu Fan picked up this paper again, the texture of this paper is relatively brittle, Yu Fan looked at the back carefully, it was also blank, nothing, Yu Fan stood up again and took it to the window to face the sun, let the sunlight pass through this paper, to see what the mystery is, but nothing was found.

Yu Fan sat on the office chair with some loss, what the hell is going on? What exactly is the sender trying to say? No matter how you look at this paper, it's an ordinary blank paper. What does this mean exactly?

Yu Fan slumped on the office chair in a daze, although it was the first day of the working day, everyone was very busy, but Yu Fan's office was very quiet, and he could clearly hear the busy voices of everyone outside the office, "Mr. Wang, Happy New Year, the New Year is coming, is there any order demand?" "Mr. Li, I said that I would return the money before the year, why haven't I given it after the New Year? "Ah, yes, I'll come to your factory in the afternoon, okay, that's it. "XCMG, I sent you the invoice a year ago, did you receive it? Oh, okay, it's good to get it, I'm afraid that after so many days of vacation, I will forget it. ”

Suddenly, Yu Fan sat up, maybe the starting point of our reasoning was wrong?