"Flawed?" Master Kong likes this word the most, especially at this moment, when he is forced to be a little out of breath by Zhu Ruiping's aggressive posture.

Gu Chen's words are undoubtedly timely rain.

Secretary Zhou also stared at Gu Chen with big eyes and asked, "Officer Gu, you said that Zhu Ruiping's mortgage is fake, what evidence do you have?"

"Yes, you...... What evidence do you have? Why do you say that my mortgage is fake? You slander. ”

Hearing the conversation between Secretary Zhou and Gu Chen just now, Zhu Ruiping also knew that the person standing here in front of him, accusing the mortgage of the deed in his hand of being a forgery, was a police officer from the Criminal Investigation Group of the Furong Branch of Jiangnan City, and he couldn't help but feel a little nervous.

But nervousness is nervous, and at this time, Zhu Ruiping has no way to retreat, and he never wants to give in.

"No need to pretend to be aggrieved and indignant. Gu Chenyun looked at Zhu Ruiping lightly, then looked at the yellow paper back and forth, and said with a smile: "As far as your handwriting is concerned, although it is the handwriting of Old Man Kang when he was alive, it is not necessarily written by Old Man Kang. ”

"What...... What do you mean?" Zhu Ruiping looked at Gu Chen puzzled.

Gu Chen said with a smile: "That is to say, you can find a calligraphy master for these handwritings, and according to the calligraphy and habits of Old Man Kang during his lifetime, you can copy out a mortgage book with exactly the same handwriting." ”

"Huh?"

"Can you copy it?"

"Why didn't we think of it before?"

"That's right, if you are a master of calligraphy, you can write this kind of handwriting, such as Wang Xizhi's calligraphy back then, many people have completely eaten it, and the fakes written out are placed in the exhibition hall, then it is the same as the real thing. ”

When many people heard Gu Chen's words, they also suddenly realized that it was obvious that the situation that Gu Chen said was completely possible.

Zhu Ruiping was not convinced, and said: "Can ...... But this is just your one-sided statement, it is just a hypothesis, and there is no real evidence at all, so why do you say that this mortgage is a copy of the handwriting forgery?"

"yes. An executive standing behind Zhu Ruiping suddenly stood up, pointed at Gu Chen's nose and said: "You are really ridiculous as a policeman, you say that you will copy it? This is a thing with age, the paper is yellowed, and it is obviously something written by the old man Kang himself." ”

"It's okay if you don't say it. Seeing that the other party's executive was aggressive, Gu Chen just shrugged his shoulders and walked in front of him easily.

The senior executives of the Zhu family, who were half a head short of Gu Chen, suddenly hurriedly took two steps back, and kept a relatively safe distance from Gu Chen and said, "Originally." ”

"Then have you ever considered why this paper is yellow?" Gu Chen's soul torture suddenly made the Zhu family executives on the opposite side also stunned.

He only knew that the paper would turn yellow after a long time, but he really didn't think about why it turned yellow.

"I can tell you. Gu Chen smiled and took two steps forward: "Because the paper is made of bleaching with acidic substances, although it is neutralized before leaving the factory, there will be residual substances left on it, and after a long time, the paper will be oxidized, and it will turn yellow, in fact, the paper components are oxidized." ”

"Original...... I see. The executives of the Zhu family were stunned, and the arrogance just now suddenly subsided a lot.

Gu Chen then walked up to Zhu Ruiping and said: "Lignin is one of the main components in plant fiber, it has aromatic properties, it is a compound containing carbon, hydrogen, and oxygen, according to chemical analysis, lignin contains the following functional groups. ”

"Wait. Zhu Ruiping suddenly interrupted Gu Chen's speech and asked, "What is this 'functional group' you are talking about?"

Gu Chen smiled: "Functional groups are atoms or clusters of atoms that determine the chemical properties of organic compounds, can you understand that?"

Zhu Ruiping seems to understand.

was originally a scumbag, although he went to the United States to stay abroad, but it was just a pheasant university.

However, Zhu Ruiping's concept of atoms and atomic clusters is still somewhat vague.

"You...... You say. Seeing that Gu Chen had been staring at him, Zhu Ruiping had no choice but to stop talking again.

Gu Chen looked back, and then said: "I just said that the functional groups contained in lignin actually include methoxy, hydroxyl, carbonyl, aldehyde and ether bonds. ”

"Lignin is white or nearly white, insoluble in solvents, fragile in texture, dissolves at high temperatures, and its solution is milky white or dark brown. ”

"Because lignin contains various functional groups, its chemical properties are relatively active, such as sulfonation, so that lignin becomes soluble lignosulfonate, oxidation into soluble chlorinated lignin. ”

"But lignin is the most susceptible to oxidation, especially in the presence of light, high temperature and alkali, and the oxidation is more rapid. ”

"Moreover, modern paper contains more lignin, so newsprint is very easy to turn yellow and brittle, and it is not easy to store for a long time. ”

"That's right. Hearing this, Lu Weiwei couldn't help but interject: "Those old newspapers in my house are the easiest to turn yellow, and they are yellow and brittle, and they can be broken by just pinching." ”

"I have it at home. Nie Xiaoyu couldn't help but say a few words: "This kind of old newspaper, there are many of them in my family, it is really the same as what Brother Gu Chen said, it turns out that there are so many chemical factors in it." ”

Zhu Ruiping was obviously a little confused by what Gu Chen said.

He could see that the young man standing in front of him was obviously a scholar.

At the very least, he can blurt out this seemingly complex knowledge, which is enough to see how strong the knowledge reserve in his mind is.

Ordinary people, even if they can usually see it in the library, they may not be able to remember it so well.

But the young man in front of him can, which is a bit scary.

Seeing that Zhu Ruiping stopped talking, Gu Chen smiled and said: "Therefore, it can be seen that because the raw materials of papermaking contain plant fibers, especially lignin, pectin, fat, pigment and other ingredients, there are potential factors for the harm of paper, so there are these problems, but you ...... this yellow paper."

Gu Chen deliberately scratched the corner of this yellowed mortgage with his fingers.

However, to everyone's surprise, the paper was intact, and Gu Chen continued to press hard, and the paper began to be deducted.

"Tsk, paper that is about 20 years old is not as brittle as it is for more than 20 years. Gu Chen's gaze looked at Zhu Ruiping again.

Zhu Ruiping was a little yellow, and even a little retreating, and then at this time, another middle-aged executive with a tall and thin figure, black-framed glasses, and a capable appearance appeared next to Zhu Ruiping again.

He was like a staff general, showing a trace of disdain in response to Gu Chen's question.

"I said this young man, oh no, he should be called Comrade Police, right?" said the tall, thin man with glasses had a look of disdain.

Gu Chen shrugged: "Whatever, do you have anything to say?"

"Hmph. The tall and thin glasses man snorted twice and said, "What you said is true, but you must also know that if I can do these three things, then the paper will turn yellow, or reduce the brittleness, it is completely achievable." ”

Seeing that the other party was full of confidence, Gu Chen nodded, stretched out his hand and said, "I want to hear about it." ”

"This first. The man learned from Gu Chen's morale just now, raised his head, put his hands behind his back, walked in front of Master Kong, and said:

"The first point is to reduce contact with air, the second is to reduce contact with moisture, and the third point is to reduce contact with sunlight. ”

Gu Chen clasped his hands to his chest, supported his cheeks and thought for a few seconds, then nodded and said, "That's right, what you said is right." ”

Seeing Gu Chen's approval, the tall and thin man with glasses who looked like a scholar suddenly felt a little proud, and said:

"Contact with the air cannot be avoided by ordinary people, but contact with moisture and sunlight can be avoided as much as possible. ”

"If you don't use certain books often, you can try to put them in a plastic bag and seal them and take them out when you use them. ”

Gu Chen nodded: "Please continue." ”

The tall and thin man with glasses smiled, and walked up to Secretary Zhou again: "This is usually the storage period of paper, in fact, it should not exceed more than one year, even if the storage conditions of the paper are good, the paper will be discolored and deteriorated if it is stored for too long." ”

"If the paper is stored for two years, the coated paper will turn yellow and depowder, the newsprint will turn yellow and brittle, the packaging paper will change color and reduce its strength, and the yellow board paper and containerboard will become moldy and deteriorate. ”

Seeing that everyone at the scene suddenly fell silent, as if this was his own stage, the tall and thin glasses man suddenly felt proud, and the corners of his mouth raised a confident arc.

He continued to smile at Gu Chen and said, "So under normal circumstances, the white paper we use is made by the paper mill processing the fiber pulp formed by processing the tree fibers and drying them on a flat plate. ”

"But you can imagine the color of the cross-section of the trunk, the wood fibers are slightly yellowish, so the paper is bleached with sulphur dioxide in industry. ”

However, the bleaching of sulfur dioxide is not as stable as chlorine, it is easily oxidized by oxygen to sulfuric acid and loses the bleaching effect, so that the color of the wood fiber itself is exposed, which is what Officer Gu said before. ”

Gu Chen continued to nod, but did not speak.

"Sulfuric acid destroys the fibers in the paper. The tall and thin glasses man raised his right index finger, as if a tall man was teaching a group of scumbags, and said confidently between his words:

"As a result, the paper becomes brittle, and in addition, the paper is too dry and the oxidation of the lignin in the paper can also cause the fibers to break and cause the paper to become brittle. ”

"So, if you can do the three things I mentioned before, what about the yellowing of the paper? The brittleness of the paper can theoretically meet the requirements of the experiment you just had. ”

"Okay. Zhu Ruiping saw that his executives could PK Gu Chen, and the whole person suddenly became excited.

He slapped the tall and thin glasses man on the shoulder, almost knocking off the glasses man's black-rimmed glasses.

The tall and thin man with glasses immediately helped his glasses, and he also tidied up his shirt quite proudly, exhaled with his chest up, like a victorious rooster, and looked at Gu Chen uncontrollably.

Lu Weiwei froze.

Nie Xiaoyu was also stunned.

Including Officer Wang, Master Kong, as well as Bai Xiaolan and Wu Jun from the TV station, as well as Secretary Zhou and the foreign businessmen, they were all shocked by the words of the tall and thin man with glasses just now.

He directly used a direct theory to reject Gu Chen's previous experiments and made a reverse proof.

It proves that the situations mentioned by Gu Chen also have special circumstances.

The high salary is not taken for nothing, you have to stand up and solve problems for the boss at the critical moment, the tall and thin glasses man is now this kind of experience, don't want to feel cool.

He even excitedly wanted to high-five Zhu Ruiping to celebrate, but after all, due to the on-site environment, he restrained himself.

Gu Chen suddenly covered his mouth and snickered, which made Lu Weiwei and Nie Xiaoyu beside him understand.

The tall and thin-eyed man just now was so aggressive at Gu Chen, Gu Chen could still laugh out loud?

How do you look at this, it doesn't look like Gu Chen's style?

Master Kong was also anxious: "Gu Chen, it's all this time, why are you still laughing? When that glasses boy said this, doesn't that mean that it confirms that their mortgage is real?"

"Master Kong, don't worry. Gu Chen also smiled, and said lightly: "They were so anxious to confirm, but they dug a pit and buried themselves." ”

"What?......? Gu Chen, what do you mean by that?"

"Yes, Senior Brother Gu. Lu Weiwei, who seemed to know Gu Chen very well, was becoming more and more difficult to understand what Gu Chen was thinking at the moment.

OS is not working?

Telepathy is gone?

Why is Gu Chen a little incomprehensible?

Nie Xiaoyu also hurriedly asked Gu Chen: "Brother Gu Chen, why do you say that, could it be that they have exposed themselves?"

"Pretty much. Gu Chen clasped his hands to his chest, and he was already confident.

It seems that the other party is bouncing in front of him, and he is undoubtedly digging a hole for himself.

Zhu Ruiping and the tall and thin glasses man on the opposite side were also stunned by Gu Chen's surprisingly calmness.

The two have never seen each other, and when they scare each other so much that they have nothing to say, the other party is still snickering?

What the hell is this?

Zhu Ruiping took a step forward and said, "Young man, what are you laughing at, so happy?"

"I laughed at you for helping me tell me all the things I wanted to add and explain, just so that I don't have to tell everyone. ”

"What?" The tall and thin man in glasses was stunned for a moment, and was instantly frozen: "What do you mean......"

"I mean, you helped me explain why paper that's been yellowing for more than 20 years can have such hardness, and that's another reason I'd like to say. Gu Chen answered directly.

Then Gu Chen brought the yellowed paper back to everyone: "As the gentleman with glasses said just now, if I can reduce the contact with the air, reduce the contact with moisture, and reduce the contact with the sun, I can indeed maintain the hardness of the paper and will not be fragile because of the yellowing." ”

"But have you ever thought about it, this gentleman, this is a piece of paper that is clearly folded and preserved. ”

"If it's a 20-year-old note and it's folded and preserved, it should be yellow on the outside and white on the inside. ”

"But inside and out of this note. Speaking of this, Gu Chen also specially flipped the two sides back and forth for everyone to see, and said casually: "However, the inside and outside of this note are all yellow in color, and the yellow is so uniform. ”

"Huh?"

"Holy, it's true. ”

"This mortgage is really all yellow, if it is folded and stored, then it must be yellow on the outside of the fold and white on the inside?"

"This young man is right, it's been more than 20 years, how can this paper be all yellow, and the color is so uniform?"

For a while, the surrounding leaders, foreign businessmen, and enthusiastic people also began to agree with Gu Chen's statement.

On the contrary, Zhu Ruiping and the tall and thin man with glasses panicked.

The tall and thin man with glasses used his own set of high-level rhetoric to tell Gu Chen and everyone how to keep the paper yellow and crisp.

But he didn't tell everyone that when the paper is folded and stored, the outer part that comes into contact with the air will obviously still turn yellow.

And there will be an obvious color difference with the internal paper part, but on this mortgage book held by Gu Chen, there is no such situation at all.

The tall and thin glasses man panicked, and he used his own set of high-level rhetoric to successfully dig a big hole for Zhu Ruiping.

Zhu Ruiping's face is green now......

The excitement just now was only a dozen seconds, but now he felt deep despair.

At this moment, Secretary Zhou's eyes were staring straight at Gu Chen, and he hurriedly asked him, "Officer Gu, what ...... How did you get the yellow color of this mortgage?"

"I see that this corner is also damaged, and the color difference of the entire white rice paper is also very similar to some years, if it is a forgery, then it has to be prepared a few years ago?"

"It's not that complicated. Gu Chen waved his hand, dispelled Secretary Zhou's encouragement, and said lightly: "This color is obviously dyed with a certain solution, what is it?"

Gu Chen then sniffed the tip of his nose again, and then said twice: "Oh! By the way, it's tea juice, it's Mr. Zhu Ruiping, who used tea juice to dye the notes, making the paper yellow." ”

When Sister-in-law Kang heard this, she hurriedly walked to Gu Chen's side, took the mortgage in Gu Chen's hand, and quickly put it on the tip of her nose and sniffed it, and then said:

"What Gu Chen said is right, I have been making tea for so many years, can I know the tea juice as soon as I smell it, although the taste is very light, obviously it has been some time, but this is definitely the taste of tea. ”

"I'll see. Another foreign business representative, seeing this situation, hurriedly stepped forward to take the paper, and sniffed it like Sister-in-law Kang: "Well, that's right, it's tea juice, or the hottest tea this year." ”

"Show me. ”

"I'll take a look too. ”

......

Suddenly, many veterans of the tea industry also volunteered to come to inspect.

Sure enough, everyone not only smelled the tea, but also guessed that it was the tea industry.

And the problem of uniform yellowing of the paper was also revealed under Gu Chen's reasoning.

At this time, Zhu Ruiping was completely panicked.

He originally carefully planned this fabricated fact, but he didn't expect that he would be exposed by the young man in front of him.

This young man is simply terrifying.

In the face of the verbal criticism of many people, Zhu Ruiping was afraid, he was afraid that he would be dismantled by the crowd at the scene, and with a light turn, Zhu Ruiping ran away.

"Look, the guy surnamed Zhu has run away. Lu Weiwei was sharp-eyed, and she found the situation at a glance.

......