There are many ways to write secret letters, such as mixing aminopyrin tablets with water, and writing can also be revealed after special treatment. For example, mixing starch with water and rice water, slight wipe of iodine can also show the writing can also be revealed.

Yang Xiaojin chose to use onion juice because the method of onion juice is relatively simple. If someone wipes it with iodine as soon as possible, he will not be able to see the handwriting clearly after roasting it on fire.

After mixing the onion juice with the paper, the burning point is much lower than the paper, so after baking it a little, the font will turn brown.

Yang Xiaojin watched the paper crane slowly fly away, and the expectations in her mood seemed to fly away with the paper crane. She hoped that when it flew back next time, she could bring good news to herself.

...

At this time, Ren Xiaosu was following Zhou Yingxue in the wilderness. Because the Wang family consortium was recently arresting suspicious characters, the two of them thought the car was too big, so they abandoned it without using it.

I could have got two motorcycles, but neither of them could ride them...

Ren Xiaosu's retention mission has been completed, but what disappointed him is that this mission rewards only the basic level skill map, not the perfect level, which means that he still has not been able to replicate other people's extraordinary abilities.

But the problem is not big. The mission will always come again, and the perfect skill map will appear again.

The black market that Zhou Yingxue mentioned is at the intersection of the Wang family, Kong family and Zhou family, in a mountain valley called Luocheng not too far away.

That Luocheng happened to be under the control of Qinghe Group. In fact, Qinghe Group only has this barrier.

The head of the black market chose the location near Luocheng, on the one hand, because it is convenient for the three consortiums to come and buy things from the black world, and it is close to the place.

On the other hand, Qinghe Group has never cared about this kind of thing, as long as it doesn’t make too much trouble in the black market.

Ren Xiaosu said curiously: "Then can anyone enter this black market?"

"Of course," Zhou Yingxue said: "This black market is very large, occupying a complete county town before the disaster, and it was very lively. Many fugitives wanted by various consortiums eventually hid here. Rich people can also come and ask them to come out to do some dirty things."

Ren Xiaosu nodded and said, "Okay, after you go in, you will pretend to be my follower."

Zhou Yingxue was a little unwilling to accept it: "Why am I a follower? I am a superb person after all."

Ren Xiaosu turned around and looked at her calmly. Zhou Yingxue's voice became weaker and weaker: "The follower is the follower... No, many people in this black market have seen me. When we had to cooperate to complete the A-level tasks before, we even reported our own abilities. If we are recognized by others, I, an extraordinary person, will be your entourage. How powerful is your identity?"

Ren Xiaosu thought, it seemed like this was the case. He turned to Zhou Yingxue and said, "Then you tell the outside world that I am your assistant."

Zhou Yingxue was happy now: "Then you need to be like an assistant, you can't call me around anymore."

"Okay, okay," Ren Xiaosu waved his hand impatiently: "Don't worry."

When the two were about to arrive outside the black market, people from the black market organization came to ask. They didn't ask about their identity, but only asked what they were doing, and even asked if they needed help booking a hotel.

Zhou Yingxue said with a arrogant look: "Let's book a hotel, two."

“So do you need to rent a car or make an appointment for a massage in advance?”

“This is not needed for the time being.”

"OK."

After saying that, the people from the black market organization left politely. Before leaving, they even wished them a happy time here...

Ren Xiaosu smashed his mouth: "The service attitude of this black market is quite good."

Zhou Yingxue said: "I don't know who is controlling this black market. The other party not only regards this place as a place to sell stolen goods, but also creates a real gold sales cave. If you spend enough money here, they will even send you invitations every spring to organize a vacation by the beach together. There are also large casinos here, and the dealers in the casino wear one by one..."

Ren Xiaosu asked, "Is it more exaggerated than what you wore in the library?"

Zhou Yingxue's face turned dark at that time: "Do you have to mention this?"

Since leaving Yang, Zhou Yingxue seems to have changed her own. She used to be for a certain job, but now she lives more for herself.

A extraordinary person left the consortium, like a bird leaving the cage.

Of course, Zhou Yingxue is still willing to dress herself up more charmingly, but she doesn't have to show it to the man deliberately.

As soon as he entered the black market, someone immediately recognized Zhou Yingxue and went up to say hello to him kindly.

Some things were different from what Ren Xiaosu expected. He thought that the previous task of Barrier No. 61 had failed. As a result, many people in the black market said that Zhou Yingxue and his team had completed their mission beautifully, and they wiped out all the members of the Fire Company in Barrier No. 61.

However, Ren Xiaosu found that Zhou Yingxue also had a look of confusion in his eyes, and he decided to have the opportunity to ask about this matter clearly.

Someone saw Ren Xiaosu and said curiously: "This one is..."

Zhou Yingxue waved coldly: "He is my assistant, don't worry about him."

Ren Xiaosu: "..."

In an instant, Ren Xiaosu was thrown by a group of snobs in front of him, while Zhou Yingxue was surrounded by stars and asked about the details of the battle at that time.

Many of these people make a living by selling intelligence. If you can say a few good things to Zhou Yingxue, you will get an important piece of information. Why not do it?

However, Ren Xiaosu found that Zhou Yingxue was not stupid this time. She spoke without leaking any useful information.

At this moment, he suddenly saw someone outside the black market leading the team in. The person at the front of the team was very strange, with a piece of red cloth covering his face, and some people following him looked very young, and they might even be students who were still in school.

The people who were originally surrounded by Zhou Yingxue in the black market left after they found that they could not find any useful information. Instead, they surrounded the young man with a red cloth on his face. Ren Xiaosu whispered: "Who is this person?"

"Member of the Knights Organization," Zhou Yingxue whispered: "This place is very close to Qinghe Group, so they can be seen often."

"Then who are those people behind him? They look very young," Ren Xiaosu said in confusion.

"I heard that it is a student of Qinghe University. Qinghe University has rules. Students must go out to travel and see the world, but they must be protected by the knights to go out."

...
Chapter completed!