Vincent looked at the man in the video carefully, then muttered to himself.

"It's familiar, but I just can't remember who it is!"

Although Vincent is a powerful extreme agent, but his behavior is perverse, Lin Chao has always felt that he is not very reliable, so he said this Lin Chao didn't expect him to provide any clues, but Lin Chao's eyes quickly locked on a certain place in the video, and he always felt that something seemed to be wrong in the video.

"Mom, you flipped the surveillance to the point when we first entered the door."

Lu Qianyu moved the mouse and reversed the monitor.

"What's wrong? Did you find anything? ”

In the video, Lin Chao and Vincent kicked the door open, and then rushed in.

"Pause! Do you guys think this place is a little strange? ”

Lin Chao pointed to the place on the right side of the door.

"What's wrong?"

"Actually, I don't know, I just feel that this place is a little strange, it's like a picture has been retouched by ps, and this place seems to have a bit of a magnified feeling."

Lu Qianyu stared at the paused screen of the video and observed it carefully, and suddenly a slight smile appeared on his face.

"Xiaochao, my eyesight is good, I almost didn't even see it. There is indeed something wrong with this place, the principle of installing light reflection, the size of the grain here, the light and shade are all problems, so in fact, this place is overlapping. ”

Vincent thought for a moment, without saying a word, and then suddenly it dawned on him.

"Invisibility."

"That's right, stealth is a special technique that changes the light reflected by itself, so that the human eye has an illusion, but if you look closely, you can still see some differences. The moment we opened the door, they were still in the room, and he escaped when we weren't looking. ”

Vincent was thoughtful on the side, he wanted to speak and stopped, his expression was extremely complicated, as if he had thought of something, and seemed to have some doubts, he and Lu Qianyu looked at each other, as if they understood each other.

"Sister Lu, in this way... It was him. ”

Lu Qianyu's gaze at Wen Sen above, it was obvious that what Wen Sen was thinking was what she was thinking, but she seemed to have deep doubts.

"But why did he do it, and what did he really want to do?"

Lin Chao was confused when he listened, both of them seemed to have guessed the initiator, but neither of them said it explicitly, but they became dumbfounded.

"Mom, Vincent, what are you two fighting dumb about? I don't understand at all. You've found some clues. ”

Lu Qianyu didn't directly say their guesses, maybe he also thought that even if he said Lin Chao, he didn't know who it was, and the most important thing at the moment was to find Lin Zhengfeng's whereabouts first. But Lin Chao could obviously feel that her nervous mood just now had relaxed slightly, or that the person who kidnapped Lin Zhengfeng had no malicious intent.

"Xiaochao, we are just some guesses, the most important thing now is to find your father's whereabouts, I guess they should still be somewhere in the hospital now."

But the hospital is so big, where are we going to find it?

Lu Qianyu didn't think of any better way, if this person used stealth techniques, then his trajectory would be too difficult to find. Although he found a flaw in the video just now, the differences are extremely small, and it is too difficult to rely on these extremely small differences to find their traces, so he had to aimlessly flip through the surveillance to check.

Vincent's computer is a new projection screen, so you can control the size of the screen, Lu Qianyu enlarged the screen to about two meters wide, one meter five or six height, there are eight split screens on the computer screen, each split screen is a location monitoring screen. Lu Qianyu turned the playback speed to eight times the speed.

It will be a little difficult for the average person to look at eight screens at double speed, but the human brain is different. Some people have a very strong ability to catch up on eight screens, even if they look at eight screens at eight times the speed, they can easily capture the difference in every frame. Lu Qianyu has such an ability, and Lin Chao has also inherited this ability from his mother.

After about five or six minutes, Lu Qianyu's mouse stopped at one of the split-screen shots, and then quickly filled the screen, filling the entire screen.

"Vincent, you take the elevator to the seventh floor to prevent him from escaping, Xiaochao, you are fast, you hurry up from taking the stairs to the staircase on the seventh floor, he is very cunning, and it is very likely that he will not take the elevator and take the stairs."

Lin Chao locked on, this person was the one who kidnapped Lin Zhengfeng from the ward just now. Lin Chao went straight to the stairs after the door, Lin Chao has made great progress in all aspects after recent training, and he is already handy in action. From going out and then walking to the stairs, climbing from the stairs to the seventh floor, it's basically all in one go.

Vincent also hurriedly took the elevator to the seventh floor, this time was about half past one in the afternoon, there were not many people taking the elevator, there were about eight elevators at the elevator entrance of the hospital's inpatient department, plus there were few people, Vincent quickly arrived on the seventh floor.

Lu Qianyu is still watching the monitoring on the computer in the ward, and each of the three of them has a Bluetooth headset that can maintain communication at any time. Lu Qianyu observed the direction of the person on the monitor and commanded the two of them.

"Vincent, Xiaochao, you two are still guarding over there, I can't see him on the screen now, and there is no way to determine his location, but I am basically sure that he is still on the seventh floor."

Lin Chao waited at the top of the stairs for about seven or eight minutes, there were really few people walking the stairs in the hospital, and Lin Chao didn't see a single figure in the past seven or eight minutes.

"How could it have disappeared, is he invisible again, or has he left the seventh floor."

Vincent is at the elevator entrance, and there are more people coming and going here, but this time period is not the peak period Vinson basically still sees it.

"Probably not, if he wants to leave, he has to take the elevator without taking the stairs, and I can't escape my eyes even if a fly flies over here, at least so far, I haven't seen any suspicious people, I guess he should still be on the seventh floor."

Lu Qianyu stared intently at the computer screen, not daring to blink his eyes, for fear that if he blinked, he would miss an important frame.

"The last place where he appeared happened to avoid the surveillance, and he never appeared again after hiding in the blind spot, obviously he found us, he was very cunning, but I guess he should still be on the seventh floor now, but he was alone when he appeared, where did Lao Lin go."

Lin Chao was still guarding the staircase and there was still no figure, Lin Chao was also very anxious, but he was very worried, the other party would be stealth, if he appeared in front of him, he was difficult to recognize, he was very worried about letting the other party fool the past, and shot two flying claws with his suit and then sealed the door with silk threads.

"I'm still worried that he will use stealth techniques, and now it is always the enemy who is dark and I am clear, Brother Sen, you must be careful over there."

Vincent's side is still often people up and down the stairs, but Vincent is not worried that he will miss the enemy, it turns out that Vincent's equipment has a scanner, this scanner is specially developed to crack the stealth technique, the scanner can determine whether there is a stealth person by emitting sound waves and then bounce back, if someone is found to use stealth, the scanner will immediately quote, and can determine the location of the stealth, and can simulate the shape of the stealth man, the principle is probably similar to B ultrasound, Lu Qianyu also knew that Vincent had such a technique, so he was relieved to let him stay at the exit where there was a lot of traffic, and the other party was most likely to choose, and Vincent had been an extreme agent for more than ten years, and he had rich experience, and many things could be seen at a glance, as for Lin Zhengfeng's loss before, it was just that it was too sudden, and they never expected that someone would attack Lin Zhengfeng, so they were negligent and caused consequences.

"You don't have to worry, I have a heavenly eye here, I said it, even a fly can't escape my eye."

Lu Qianyu was anxious.

"You all be careful, don't miss it."

Lin Chao hid aside and waited for about twenty minutes and no one came, but soon there was a change, and suddenly there was a bang, and an unknown thing hit the line that Lin Chao was blocking at the door. Lin Chao took out a powder and sprinkled it at the door, this is a powder that Vincent gave Lin Chao that could be an invisible person.

The person who appeared was a doctor, about thirty-four or five years old, but this person was not wearing a mask, and Lin Chao simulated in his mind that if this person wore a mask... This person's body shape and form are exactly the same as Dr. Na Lu, it's him!

"Who, so unqualified! It's blocked with a wire here. ”

Lin Chao's silk thread is relatively small, a bit like tungsten filament, and the silver-white one can't be seen at all if you don't look carefully.

The doctor got up and turned to leave. Lin Chao stepped forward and grabbed his arm and pressed his face against the wall.

"Doctor Lu, where did you hide my dad?"

"Who are you! I don't understand what you're talking about! ”

Lin Chao increased the strength of his hand, and Dr. Lu screamed in pain, "Who are you?" What do you want? ”

"What are you pretending to be at this time, say it quickly!"

"I don't know what you're going to say!"

Lin Chao hurriedly informed Wen Sen and Lu Qianyu.

"Mom, Brother Sen, if you find the invisible person, come over quickly, this person is a hard bone, don't say anything if you ask."

Vincent and Lu Qianyu said together, "Okay, I'll go over right away"

Wen Sen and Lin Chao were on the seventh floor and arrived quickly, but Lu Qianyu was still in Lin Zhengfeng's original ward on the third floor. Lu Qianyu put away the computer and walked out of the ward to take the elevator.

There are a total of eight elevators here, three double-deck stops, three single-deck stops, and two that can be stopped on each floor. These elevators all stay on the upper floors, and only one stops on the third floor. Lu Qianyu walked into the elevator, and a doctor in the elevator was pushing a stretcher bed, the doctor was about forty years old, and there was a patient on the bed, the patient was about sixty years old, out of a coma, on a drip. Lu Qianyu subconsciously pressed the button on the seventh floor, but the elevator actually went down.

The doctor said, "Miss, we're going down." ”

"It's okay, you still have to go up downstairs." Lu Qianyu didn't care about laughter.

In about five or six seconds, the elevator reached the first floor, and the doctor pushed the wheelchair outside.

"I'll help you." Lu Qianyu saw that it was inconvenient for the doctor to push, so he took the initiative to come over to help.

The hospital bed pushed out of the elevator, and the doctor thanked Lu Qianyu.

"Thank you, miss, for being so kind to you. I'll go first, we'll see you later. ”

The doctor pushed the bed and was just about to leave, when one hand grabbed the bed and stopped the doctor's steps.

"Xiao Yan, where are you going, you won't say hello when you see the teacher."

The doctor was suddenly stunned, and it was Lu Qianyu who grabbed the hospital bed. About twenty seconds later, the doctor said with a smile.

"Sure enough, I can't hide it from the teacher."

Lu Qianyu hurriedly explained the situation to Lin Chao and Vincent in the earphones.

"Xiaochao, you caught the wrong person, hurry up to the first floor to find me, your father found it."

After Lu Qianyu and Wen Linchao finished explaining, they questioned again.

"Xiao Yan, let's talk about it! What do you mean! ”

The man's color should not be, but he had an expression that seemed to invite merit

"Teacher, don't get me wrong, I just want to give you a greeting gift."