Inside the rented room.
A shadow fell over everyone's faces once again, as more and more evidence indicated that the tenant had been murdered.
Guan Feng looked at Zheng Yuandong and said, "Captain, Xiang Dong is still retrieving the surveillance video. You take charge here, and I'll go over and help out. Let's see if we can save some time."
Zheng Yuandong patted Guan Feng on the shoulder and nodded, saying, "You go ahead, I'll take care of things here."
Wang Xun said, "Team leader, I'll go with you too. More people mean more strength."
Guan Feng nodded.
The two arrived at the monitoring center on the first floor.
Li Xiangdong was anxiously watching the surveillance footage.
Guan Feng asked, "How's the situation?"
Hearing the voice, Li Xiangdong turned around and said, "Team leader! We haven't found it yet."
Guan Feng asked, "Which surveillance cameras did you watch?"
Li Xiangdong pointed to the screen and said, "I'll watch the surveillance footage at the elevator entrance on the 4th floor and the surveillance footage in the lobby on the 1st floor for now."
Guan Feng glanced at the time and instructed, "Okay! You continue reading, I'll start from 2 o'clock. Wang Xun, you start from 8 o'clock onwards. Let's try to stagger the times."
Li Xiangdong asked, "Team leader, are you going to read most of it by yourself? Can you manage?"
Guan Feng waved his hand and said, "Let's see first."
Li Xiangdong then fell silent.
Guan Feng sat down and began to watch intently.
The two screens played the footage at double speed, which was the speed Guan Feng usually used when watching surveillance footage.
After all, this isn't watching a TV series. Every figure that passes by on screen has to be compared with the target object, and even the environment and details have to be considered. It requires a high level of instantaneous judgment from the eyes and brain.
You can wear glasses.
Guan Feng felt that the speed was too slow.
The figures seemed to be playing in slow motion.
He pressed the speed up button.
Four times!
The image flashed by almost like a double image.
Guan Feng's vision remained clear.
Five minutes later.
He had gotten used to the viewing speed, watched for another two minutes to give himself some time to adjust, and then set the speed to eight times the normal speed.
The scene sped up completely, with figures flashing by and the environment changing in an instant, yet Guan Feng's eyes didn't feel dry.
With the help of smart glasses, even fleeting images remain clear.
This is the persistence of vision function of smart glasses!
When the human eye observes a scene, the light signal is input into the brain's nerves, which takes a short period of time.
After the light input ends, the visual image does not disappear immediately, but continues for 0.1-0.4 seconds. This visual persistence is called "afterimage" or "visual persistence".
Smart glasses, however, can extend this time even further and assist in processing it!
The reason why Guan Feng could still receive the surge in input information was precisely because of this.
He watched intently.
Gradually.
Those images kept flashing by.
Guan Feng was completely immersed in it.
Wang Xun, Li Xiangdong, and others realized that something was wrong.
All three of their screens were mounted on the wall.
Li Xiangdong and Guan Feng's two screens were even placed next to each other.
As a result, he was able to watch it normally, but the team leader's screen was completely filled with static.
He couldn't help but nudge Wang Xun.
Following Li Xiangdong's gesture, Wang Xun saw the image on the team leader's screen flash by.
"How many times? Eight times? Team leader... can you see clearly?"
Wang Xun stared at the screen in surprise.
Li Xiangdong clicked his tongue and said, "This must be beyond the limits of human vision, right? Team leader, don't let something else go wrong. Have you forgotten what happened a couple of days ago?"
Wang Xun nodded and said, "I should remind the team leader."
He nudged Guan Feng and asked with concern, "Team leader, can you see this clearly?"
Guan Feng adjusted his glasses and said without turning his head, "After staying up all night to watch Li Lan and the others' videos, I focused on training and found that I've made great progress. I can now see them clearly even at 8x speed."
Wang Xun was stunned.
Li Xiangdong rubbed his eyes.
Li Lan? Huang Youwen's action movies? Can you really develop sharp eyesight like that?
Li Xiangdong immediately said, "Team leader, now that you mention it, I'm actually quite eager to improve. Do you think if there's another opportunity like Huang Youwen's next time, could I get some practice too? Don't worry, team leader, it's just one night, right? I can handle it!"
Pfft!
Wang Xun laughed: "Xiang Dong! Is that perseverance? You're just enjoying it!"
Li Xiangdong chuckled and said, "Isn't this because I want to develop the ability to see through anything? Naturally, I need to find better material."
Guan Feng pressed the pause button, patted Li Xiangdong on the shoulder, and solemnly reminded him, "It's good that young people want to improve, but doing your job well is the key! There's a high possibility of a murder right now, and you still have the mind to think about these things? Have I been too lenient with you usually?"
Li Xiangdong's face immediately fell, and he dared not speak again, sitting up straight to watch the video.
Wang Xun also put away his joking thoughts.
The three continued watching.
Time passed second by second.
40 minutes later.
Guan Feng rubbed his temples. After watching the 6-hour video, he still couldn't find the person involved. His shadow deepened, and he turned his gaze to the two people next door.
Wang Xun and Li Xiangdong finished reading it at almost the same time.
Li Xiangdong said, "Team leader, we haven't seen the other party leave!"
Wang Xun said, "Me too!"
Guan Feng frowned and said, "The other party did not leave! Or rather, did not leave the surveillance footage. This is a major suspicious point! Move the surveillance footage forward a bit to see when Liu Yufang entered the building."
"How about this, according to the time provided by the property management, it should be around ten o'clock. Let the three of us watch it together this time to prevent any oversights."
The screen flickered again.
At 8x speed.
The scene is almost entirely filled with falling snowflakes.
Li Xiangdong and the other man were both dumbfounded. What could they possibly see at such a high speed?
Guan Feng, however, was completely absorbed in the scene. After a moment, he pointed to a corner of the screen and said, "Stop! Zoom in on that figure."
Li Xiangdong operated the computer, paused the screen, and zoomed in on a certain face.
"There really is... Liu Yufang! Team leader, this is Liu Yufang!"
Li Xiangdong stared at the screen in surprise.
Guan Feng waved his hand and said, "Pull up the surveillance footage from the fourth floor as well, to determine the exact time she went upstairs, and see if there were any unexpected incidents in between."
"OK!"
Li Xiangdong, disregarding his surprise, immediately retrieved the relevant surveillance footage.
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