As soon as Zheng Zhihua fell, he was knocked on the head by Jing Fei.

He looked at Jing Fei angrily, and Jing Fei said, "Sister Xi, I will listen to your instructions next."

Xue Xi nodded.

Zheng Zhi said angrily: "She is a p4, and we are all p9, so why listen to her?"

This time, without Xue Xi speaking, Jing Fei said, "Then you have a way to catch people without causing turmoil?"

Zheng Zhi: "..."

He paused and was about to speak when he heard Jing Fei say angrily: "Son, shut up if you can't help it! Don't force it!"

"..."

In the entire experimental building, Jing Fei's people stopped at first, but it was a long time and refused to let it out, which caused a sensation.

Everyone wants to leave, expressing panic.

At the entrance of the experimental building, a group of staff pulled the railing to block the people who rushed out of it. Thousands of students were stuck there, and the noise in the lobby on the first floor was deafening.

The students are protesting:

"What happened? Why don't you let us go?"

"That is, we heard the sirens and heard that there was a fire, so why didn't we let us leave? What happened? Are you responsible?"

"We have the freedom of life. It is illegal for you to detain us without giving a reason!"

"..."

The people stuck outside were wearing police uniforms, and were asked by this group of law-savvy college students with headaches. The face-changing supernatural person in the crowd changed his face and position for a while, encouraging the crowd to roar:

"What? Are we breaking the law? Freedom?"

"Also, you said you are the police, who knows the truth? Did you detain our documents?"

"..."

The superb policeman opened his mouth: "Of course there are documents, but after applying, it happened suddenly, we..."

"That is no more, let us go out! You can only detain us when you get the documents!"

The face changer yelled.

The rest of the students were also anxious:

"I have an appointment with my girlfriend tonight. My girlfriend has called me four or five calls. I have all eaten. Uncle Police, Comrade Police, let me go. If I don't go, my girlfriend will be angry!

"I have a very important meeting tonight!"

"I want to confirm the theme with my instructor!"

"..."

The students of Huaxia University are very busy, everyone has things to do, and the policeman who provokes the supernatural being does not know what to say.

The face-changing ability in the crowd showed a faint smile.

There are thousands of people here, so if you continue to put pressure on it, you will always relax.

But just as the situation could not be controlled, a cold and indifferent voice came out: "Please wait a moment, everyone."

As soon as this was said, everyone turned their heads and saw a red-haired girl standing there in the crowd. Seeing her, everyone shouted: "Sister Xi!"

"Acting Dean!"

"Sister Xi, come and help us talk about it. What's the matter with detaining us here for no reason?"

The people who just watched the explosion, at the moment Xue Xi appeared, they felt as if they had found the backbone, and their hearts settled down.

no way.

The students here are all engaged in scientific research. Xue Xi's famous name, coupled with her personal charm, has become a legend in Huaxia University.

People may not believe the police, but they will believe Xue Xi.

Seeing everyone looking at him, Xue Xi slowly said, "I have figured out the matter. Now everyone is quiet and listen to me."

As soon as these words came out, the crowd fell silent for an instant, and no one spoke.

The face changer frowned.

Huaxia University is full of elite talents from all over the world, the most arrogant, he deliberately chose to do it at night, knowing that the tutors are all going home at night, and all the students are left here, so he did not expect this group of people to be Will listen to a student.

When he frowned, Xue Xi slowly opened his mouth: "A thief got into our school and stole the core materials of the light source machine. So, can you cooperate and catch the thief?"

The face changer spoke up: "Cooperate with you, but don't you let us go if you can't catch people for a day?"

Unfortunately, the students did not meet him this time, instead they spoke:

"it is good!"

"The light source machine? Where did the thief come from and stole this! It's too much!"

"Sister Xi, what do you say?"

According to the source of the voice, Xue Xi looked at the place where he had just spoken, but that place was already empty.

The face-changing ability, the more people there are, the more convenient it is to hide whereabouts.

Xue Xi retracted his gaze and slowly opened his mouth: "In this way, after a while, everyone will line up. I will check the identity. After confirming the identity, I can leave one by one, okay?"

"no problem!"

Seeing that the other students are so cooperative, it is difficult for the person with the face-changing ability to say anything.

Everyone lined up in an orderly manner and moved forward one by one.

Standing in the crowd, the face-changer had become a mathematics student who did not come in the next laboratory.

Then, he saw Xue Xi moved a table and chair, and sat at the front. After everyone in line came up to her, he heard her ask: "You said you are in the Department of Mathematics? Then I will ask you. , Have you ever studied linear algebra? I learned it in the eighth lesson..."

Xue Xi tested a point of knowledge.

Those who can come to do the experiment have good theoretical knowledge, and the other party has good answers.

Xue Xi nodded: "Okay, you can go now."

Seeing this situation, the face changer smiled immediately.

He lowered his head, and when it was his turn soon, the two supernatural beings standing on both sides of Xue Xi were still talking: "Sister Xi, this is a good way! What you are asking about are all learned knowledge. The other party is a spy. I don’t understand deeply enough! Son, is my sister Xi smart?"

The man called his son had a stale look and snorted when he heard these words: "It's OK."

The face changer shook his head slightly, it was childish.

Dare to come to Huaxia University as an undercover agent without any knowledge reserves, will he dare to come in?

He quickly arrived in front of Xue Xi.

The red-haired girl raised her head and asked: "Are you from the Department of Mathematics? Then I ask you about the calculus of advanced mathematics."

The face changer nodded.

Xue Xi asked a question.

The face changer answered cautiously, his answer was perfect, he would not memorize the contents of the book verbatim, nor would he not understand it, just like any normal person.

After answering, Jing Fei asked, "Sister Xi, did he get it right?"

Xue Xi nodded: "Yes."

Jing Fei waved his hand, "Let's go."

The face changer walked forward and crossed the isolation line, he could continue to become any person, and would never be found out, but at this moment--