Bai Song, who was about to leave the office, stopped in a daze.

Standing at the door of the office, Bai Song's brain was racing.

What's wrong?

"Eh, Bai Song, how are you..."

Ma Xi passed by from here, and happened to see Bai in this state, and he didn't know what was wrong with him, so he came over to ask Bai Song, but Bai Song directly stretched out his hand, put his left index finger to his mouth, and signaled Ma Xi not to speak.

Ma Xi naturally understood the meaning of Bai Song's gesture, and immediately closed his mouth.

Bai Song maintained this movement, and retreated step by step from the door.

Seeing this, Ma Xi didn't know what was wrong with Bai Song, so he slowly followed Bai Song into the house.

Bai Song thought about everything just now, reversed the scene in his mind, slowly reached his place, and then took out the blank paper that had been put up.

The blank paper didn't ask...

Bai Song was thinking about it just now, and suddenly found that there were only two handwriting lines on this white paper.

That's right!

That's what is wrong.

Bai Song experimented three times with three pens, and there should have been three different handwritings, but now there are only two!

Call~

The adrenaline that had just been secreted in large quantities receded like a tide at this time, and Bai Song sat down on the chair softly.

Yes, fade pen.

One of the three pens is a fade pen, or a UV highlighter.

If so, then Scarface should have written something with this "invisible pen", but it is not known what exactly was written.

Whether it's an invisible pen or a faded pen, how do you develop it?

What we are more common in our daily life is the ultraviolet lamp imaging, which is similar to the anti-counterfeiting mark of money, and Bai Song immediately checked a lot of information on the Internet.

On the website of the relevant paper, Bai Song checked and took notes.

"Is this pen gone after writing?" Ma Xi curiously picked up the pen and observed: "This is a bit similar to the one my son uses to practice calligraphy." ”

"If that's the case, it's troublesome. Bai Song said casually.

"What's the difference?" asked Mahi curiously?

"Look at this", Bai Song held the phone in front of Ma Xi, "what you are talking about is a faded pen for practicing calligraphy, and the mechanism is that the chromogenic substances in the ink react with oxygen, carbon dioxide or water vapor in the air to become colorless substances. And this reaction is usually irreversible.

For example, this photosensitive agent, the scientific name is indoline benzopyranoic acid, which is dissolved in water for an open-ring structure, color-developing, under the action of ultraviolet light, forming a closed-loop structure of the invisible body, which is colorless, but how to become a colored substance, we don't know... This is beyond my level of chemistry...

Unless, this is a UV imaging pen, it's no fun. ”

"Don't say it, I don't understand, what the hell is this, but I understand, that is, go buy a small ultraviolet laser projector and try it now, and you will know the ending." Ma Xi said: "This is simple, there are some in the stationery store at our door, and I will buy one for you in a while." ”

Imperceptibly... Ma Xidu began to think of himself as a small soldier and Bai Song as a sheriff...

"No, no, no..."Bai Song was a little embarrassed: "I'll just go." “

After speaking, Bai Song didn't think much about it, just put down his things and ran out by himself.

Ma Xi watched Bai Song run out, and said in his heart that this young man is still sensible, and he knows this kind of thing to do in a hurry, but Ma Xi was just about to leave, but suddenly found that Bai Song's things were not cleaned up, dare to let him help take care of it?

Forget it, let's watch the house, Ma Xi didn't bother to touch these things, so he sat quietly and waited for Bai Song to come back, he also wanted to see what the ending was.

Soon, Bai Song ran back, and after a few hundred meters of back and forth, Bai Song's head was sweating.

"I hope it works, if it's really a pure fade pen, it's troublesome. Bai Song held up a small toy ultraviolet lamp.

Bai Song carefully looked horizontally and obliquely at the pages of the notebook, and if he looked closely, he would find that there were indeed traces of writing on the paper, but there was no color.

After irradiating the ultraviolet lamp for a long time, there was not a word, and Bai Song continued to illuminate the book, but there was still no word.

Bai Song took out a piece of RMB and took this lamp to shine it, but found that the anti-counterfeiting mark on it was clearly visible, so there was no problem with this small lamp, which means that this is not an ultraviolet highlighter.

"Isn't that possible?" asked Marhi.

"Well, no, but, I can see that some words have indeed been written in this notebook, but they are gone, I guess it's a faded pen, and I don't know what this scarface wants to mean. Bai Song pointed to some of the handwriting marks on the notebook.

"Can you be sure that there are words here?" Ma Xi also saw what Bai Song meant, "Then don't worry, there is my old classmate in the handwriting appraisal of the Municipal Institute of Criminal Science and Technology, as long as you have written, it will be no problem to hand it over to him." ”

"Is this okay?" Bai Song was a little surprised.

"Professional things are handed over to professional people to do, have you forgotten this?" Ma Xi saw that Bai Song didn't understand, and felt a lot more comfortable, I have to say that it is a very happy thing to educate and guide Bai Song.

Bai Song nodded, indicating that he understood.

Modern crime solving is the result of cooperation in all aspects, and with the development of science and technology, technical means are becoming more and more important. It's just that there are reasons for confidentiality, and Bai Song doesn't understand many technical means.

There are procedures for filing a case, and it is not difficult to identify the handwriting, and Bai Song habitually handed over this matter to Ma Xi.

After Marsch agreed, he began to go through the formalities, and the formalities were half done...

Suddenly discovered?

？？？

Who's the sheriff? Who arranges for whom?

Is this a trick?

Bai Song didn't think about it so much, he had other things to do.

From the Great Northern Vegetable Market to the East Third Courtyard, it is not far away. This is also the reason why Scarface, Fei Ming and others live here, after all, these people don't pay much attention to the housing environment.

Bai Song parked the car at the entrance of the Dabei Vegetable Market and walked slowly to the East Third Courtyard.

On the way, Bai Song looked around and soon saw a booksstand.

This is what Bai Song is looking for, if the scene is reproduced, combined with the cross-analysis of various clues of the interlaced authenticity and falsehood that are currently mastered, there can be roughly such a context.

1. There is a suspected tomb or "treasure" in the vicinity of Da Son City, Da Son Province;

2. Fei Ming, Fei Peng and others knew about the matter and discussed it with Scarface together, but did not reach a specific agreement;

3. Scarface did it himself and abandoned all these people, but these people kept it secretive;

4. Scarface has done some research on the matter, may have bought some messy books, and has some plans of his own;

5. Scarface is ready not to come back and takes all the belongings and other things with him;

6. Scarface is missing.

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