After a short rest, Chen Hu was sent to the hospital for examination.

Lin Feng went back to the basement and observed it carefully.

Sure enough, it was almost what he thought.

At the door, I found some hair tied in a straight line, a toothpick and an empty capsule.

These things hang at the front door. As long as someone comes in, the hair will be broken by the door, and then the powder in the capsule will pour out, which is an illusion.

The overhead lamp was also made hands and feet. The bulb was coated with a layer of medicine that will evaporate rapidly after heating. As for why it went out, one of the tungsten wires was broken.

In addition, it was found that the ventilation duct in the basement seemed to have been moved, because this place is a large shopping mall. Considering the problem of heat dissipation, the ventilation duct was specially made very large.

So let an adult get in, and then let an adult get in, and then quietly escape here.

Seeing this, Lin Feng couldn't help but sigh to himself. This man's mind was really meticulous.

After checking the basement and confirming that there are no other goods received, we arrived at the monitoring room.

In the surveillance screen, the man guarding the door, who was originally standing well, suddenly yelled like he saw something, and then gradually talked and laughed.

Then, he made a series of indescribable actions, and then reached out and hugged an invisible man's waist and walked out of the monitoring screen.

Half an hour later, the man came back again. After another period of time, Gulan and others arrived. It wasn't long before Lin Feng came.

Seeing this, Gulan pressed the pause button.

"I haven't seen it for several times. What's going on? Why don't we ask the people from the relevant departments?"

Lin Feng chuckled.

"Come on, be careful that others will sentence you to illegal detention."

After hearing this, Gulan couldn't help pouting and put his hands around his chest.

"Then what the hell is going on!"

"Well, don't be angry. Let me explain to you."

In other words, the monitoring screen was turned back to the beginning.

Almost everyone didn't notice that there was a gust of wind at that time.

Because Lin Feng found that the man standing at the door shook his hair a few times.

Combined with those just found in the basement, Lin Feng felt that the guy estimated that he would use this gust of wind to sprinkle hallucinogenic drugs, so as to make men hallucinate.

After hallucinating, he left the monitoring screen for half an hour. Half an hour later, he came back alone.

From the monitoring screen, it is true that a person came back, but as long as you observe carefully, you will find that the person's feet are big and small, and the shadow behind him is also a little strange.

After they stood back to their original position, some shadows appeared next to them, and then disappeared soon.

Lin Feng guessed that this was absolutely because the man hid behind the man from the beginning, avoided the monitoring probe in this way, and entered the basement.

After entering the basement, he unlocked wolf's body with the key of the man standing outside and let him run out.

Quran was thoughtful when he heard this.

"What do you say? I seem to have seen that man in the basement. What's the situation?"

Lin Feng frowned slightly.

"I'm sure the man I finally kicked is real, not my illusion."

After carefully recalling the scene at that time, he said again.

"At that time, there was still a distance between the position where we stood and the air outlet of the ventilation duct. It was absolutely impossible for that guy to escape from there in such a short time."

First, there is a high distance between the air outlet and the ground. Unless it is a professional athlete, it is absolutely impossible to climb to that position through jumping, and even if it can be done, it will definitely make a sound.

Second, at that time, everyone rushed in from the outside, and everyone was holding a flashlight. The whole basement was illuminated. If strange people were found, they would be seen at the first time.

To sum up, Lin Feng has a bold idea.

"If I guessed correctly, in fact, the man didn't escape from the beginning."

"What do you mean?"

Lin Feng took a deep breath.

"Let's watch the surveillance."

Return the surveillance screen to the time when Quran took people to the corridor.

Lin Feng counted carefully. With the Koran, there were eight people in total.

Then they quickly went in and everyone came out. Eleven people appeared in the monitoring screen.

After pressing the pause button, Lin Feng turned to look at Gulan.

"One more person."

Gulan frowned. After comparing back and forth, he found that there was indeed one more person, but when he thought about it carefully, he couldn't remember who was more.

Because everyone was wearing the same clothes at that time, and their height and body shape were not much different, it was difficult to identify.

After making several comparisons back and forth, Lin Feng circled a person.

The man looks ordinary and has a public face, which makes it difficult to remember his appearance.

But after seeing it, Gulan was surprised.

"I seem to have an impression of this man."

"He came to register before. I also see that he often comes here, but he hasn't talked to him much. Wait, I'll find his information."

After saying that, he didn't listen to what Lin Feng said behind him, and ran out directly.

Soon, Gulan came in with a large stack of information.

"This is the information of all the students who signed up during this period. This guy's information must also be in it."

As he spoke, Quran flipped quickly.

"As long as we find this guy's information, we may be able to find some clues. Here we are."

Take out one from the inside and hand it to Lin Feng.

Lin Feng took it easily. After opening it, he just took a look, then unfolded it and showed it to Gulan.

When he first saw the content above, Gulan's heart clicked.

"This... How can this be? Why is there nothing?"

All the information is blank except one photo.

Lin Feng shrugged.

"Just now I told you not to be busy. You don't listen. How can a person with such a careful mind leave any clues?"

Gulan suddenly realized.

"I see! He must have used a pen that will disappear automatically, so these materials will disappear, but as long as he puts it in the refrigerator for a while, or puts it on the fire for a little baking, the original handwriting will reappear."

After that, pick up the information and go.

Lin Feng grabbed her.

"Come on, Miss Gu, don't be busy."