"It has changed, it has changed! Your Highness, look, look, it has really changed!"

"Yes, it has indeed changed. Okay, now, slowly pick up the credentials."

…

"Wha...what? Then...is there any...words in the national certificate?"

"No...it can't be right? Why...why are there words on the certificate of credence after it has been soaked in water? Is it...could it be that there are words on the certificate of credence in the first place? It's just...it's just that we couldn't see it at first?"

"

"That must be the case! It turns out it needs to be soaked in water. It turns out it needs to be soaked in water. Hey, why didn't I think of that just now?"

"Haha, if you think about it, wouldn't you be 'Master Yongyue'?"

…

Some things really don’t need to be explained too much, because the eyes will give you the best answer. That’s the thing in front of you. Come on, those young men and ladies of the “Yinshan Society”,

Some people are still wondering whether Qin Yong is trying to harm Wu Zixiang, because, if not, there is no reason for him to let Wu Zixiang go against common sense and put a vital letter of credence into a basin of water to soak it.

.Can letters that have been soaked in water be restored to their original state?

To be honest, if the paper has been soaked for too long, it will naturally not be able to be restored, and even the writing on it will be completely washed away. However, this letter in front of me will not be able to be restored, because,

Qin Yong had ordered Wu Zixiang before, that is, he only needed to dip the letter into the basin for a while, and then lift it up. In this way, although the changes on the paper were not too obvious,

.However, the internal chemical reaction has already begun. Therefore, soon, you will be able to see the real credentials.

It was precisely because of Qin Yong's previous explanation that although Wu Zixiang felt very nervous during this operation, she did not doubt it after all. Until the two little ones beside her

When the palace maid discovered that the certificate of credence had indeed changed, she felt even more relieved. Because Qin Yong did not lie to her, and she could be considered to have followed Qin Yong's instructions very well.

responsibility.

"There are words, hurry up...let me see it quickly! Let me see it quickly!"

"Hey, don't squeeze. If you keep squeezing, you're still squeezing Her Royal Highness."

"But...but, I want to see what the invisible words look like."

"You can't squeeze in. Can you afford to bump into Her Royal Highness?"

"Yes, yes, it's Meng Lang!"

…

Knowing that there was a change in the credentials, everyone present was already excited. However, after all, most of the people were too far apart, so they did not see clearly. This country

What are the changes in the book? Those who are closer to Wu Zixiang can really see it clearly at this time. On the originally pure white paper, small red characters have now appeared one by one.

, However, the number of small characters is relatively large and the size is relatively small, so they still cannot clearly see the content.

"Put away your credentials. This matter is of great importance. I will bring it directly to the palace to present it to my father early tomorrow morning!"

Well, what Wu Zixiang means is probably that he doesn’t want anyone to see the contents of this letter of credence. However, there is no other way. The letter of credence is a letter of credence after all. No matter how curious you are, you

You can't rush to see it! Otherwise, once the emperor knows about this, I'm afraid he will be investigated. At the least, he will be sent to the frontier, and at the most serious, it may be to confiscate the family and exterminate the clan.

Therefore, although the young men and ladies present at the scene were still curious about what was written in the credential, they did not dare to push any further.

"Everyone, although the credentials cannot be read, there are still a few pieces of white paper here with words written on them using the same method, so I can show them to you later."

Just when everyone was disappointed, Qin Yong, who had been silent in front, suddenly spoke at this time. However, the piece of white paper he was talking about was taken from Wu Zixiang's hand.

It turned out that when he asked Wu Zixiang to prepare to solve the problem of this letter of credence, he also asked Wu Zixiang to get a few pieces of white paper that were roughly similar to this, so that he could give them to everyone present afterwards.

A detailed explanation was given.

Because, after the previous two competitions, he already understood very clearly that if he did not explain the secrets in detail, he would not be able to get out of it easily. Moreover, he has always been

I have not forgotten my current status in the "Yinshan Society", that is, as a visiting professor of the "Yinshan Society", so I should do more of this.

"Ah? What? Is this serious?"

"Of course, seriously!"

"Ah, then...that's great, then you can explain it to us right away."

Hearing Qin Yong say that there were other blank papers that were probably similar, the young men and ladies from the "Yinshan Society" at the scene were really overjoyed, so they gathered around Qin Yong one after another and "badged" him.

Well, if this was called "entangling", then they were not prepared for it. They just had a too strong "desire for knowledge". So, Qin Yong had no other choice, so he introduced them to them immediately.

It turns out that the principle used in this is just a common chemical reaction. Because in nature, many pigments will undergo certain changes with changes in acidity and alkalinity. To be more specific,

, that is, things that may be colorless originally will produce color when they encounter alkaline or acidic things. Of course, it may also be that things that were originally red suddenly turn blue. This is all because

The pigment is just the result of changes in acidity and alkalinity.

The letter of credence written by the people of Dashi to Dazhou used this principle. However, Qin Yong did not know what the raw materials they used were at the beginning, but when he thought of it, in

In this era, various chemicals are hard to come by, so they must be purely natural. So Qin Yong thought of turmeric, because under natural conditions, if turmeric is used in white

If you write on paper, you will usually only get an almost completely white white paper. However, in fact, some of the substances in turmeric have already stayed on the white paper, as long as it encounters the so-called alkaline water again.

, then it will easily change. This change is nothing else, that is, the original words are almost completely transparent. It will slowly turn into light red, so if ordinary people want to read it again, they will naturally no longer read it.

It's difficult.

This is actually the reason why there is not a single word in the cannibal's national certificate. However, at the beginning, Qin Yong really had a headache for that "alkaline water". Because of this "alkaline water",

After all, it is an extremely rare chemical substance. In this era, it is not easy for you to come up with such a chemical substance. Especially in such an emergency. What?

In fact, the self-made methods are not that practical, because they all require a certain amount of time to be made. Therefore, Qin Yong really felt a headache at the beginning.

However, he later thought about it. In this era, hadn't there already been rice dumplings? When making rice dumplings, many people would use pure natural alkaline water, which is burning straw.

The ash produced after that, and then the water finally produced after a certain process, this water is actually a simple alkaline water. When making rice dumplings, if this alkaline water is used,

It can make the rice dumplings less likely to deteriorate, and the taste is quite special. Moreover, ordinary people should store this kind of alkaline water for a long time, because if it is made, it will not take a day or two.

So, Qin Yong guessed that if he could find such a kind of alkaline water, everything would be solved.

And the final result of the matter did not disappoint his efforts, because the use of alkaline water to make rice dumplings has indeed existed for a long time in this era, and in the kitchen of this farm, there are even such things stored

A kind of alkaline water, so Qin Yong directly asked Wu Zixiang to go to the kitchen behind to get it. At that time, Qin Yong also told Wu Zixiang that after the alkaline water was brought, as long as he put the letter of credence into the alkaline water

As soon as you put it in, the result will immediately emerge. However, in order to prevent the credential from being damaged even more, it must be touched. Otherwise, who knows that the credential will be ruined in the end.

How did it collapse?

"It turns out...it's just that? It's just a piece of turmeric, plus a little alkaline water used to make rice dumplings, so it creates the magic of this letter of credence without a single word?"

After listening to Qin Yong's explanation, some people at the scene still couldn't believe that things could be so simple. That's right. This is already related to the credentials, but why is it just a piece of paper?

What about turmeric slices and a basin of water that doesn’t look like much?

However, they didn't think about it. Of today's three consecutive competitions, which one was not extremely simple and easy? But why couldn't they think of it? Only Qin Yong thought of it, so this

Whether it is difficult or not depends on who is in the hands. If it is in the hands of Qin Yong, it is indeed not difficult, but if it is in their hands, it is simply impossible.

It’s all difficult.

"That's right, in fact, it's not just turmeric that has this effect. There are also other flowers, such as some colorful flowers. If they encounter alkaline water, sometimes they will change their color. For example, they were originally red.

It can turn blue, white, or black, which is really quite magical, so if you are interested, you can try it yourself when you go back..."

Qin Yong finally said. This is what he was thinking in his heart. Since he has become a visiting professor of the "Yinshan Society", he should fulfill his duties as a visiting professor. Anyway, the matter has already been explained to this
Chapter completed!