This kind of experiment is very tedious and boring to actually do, and most of it is done with instruments. However, Lu Jin deliberately wanted to show Gu Nianzhi his ability, and did it himself, doing it with gusto, and Gu Nianzhi watched it with gusto.
When she heard her cell phone ringing and saw that it was Xie Qingying's call, she almost had the urge to hang up.
But for He Zhichu's sake, after thinking about it for a while, she still answered the call.
"Gu Nianzhi, are you disturbing your Lantern Festival celebration with Mr. Peter?" Xie Qingying asked first, her voice a little stiff.
Gu Nianzhi frowned, "Mr. Peter and I are nothing, just ordinary friends. Why do we want to spend the Lantern Festival together?"
I really never spent the Lantern Festival with Peter...
Xie Qingying felt very uncomfortable, and countless speculations were rolling in her mind. In the end, she suppressed her emotions and whispered: "Master He went to deliver something to you today, and someone secretly took a photo of you."
Gu Nianzhi: "..."
"Secret photography? Who is so free?" Gu Nianzhi was speechless, "Today is the fifteenth day of the first lunar month!"
Not celebrating the holidays at home but taking secret photos outside
Is there any mistake
"Yeah." Xie Qingying nodded lightly, "Who else? Wen Shouyi. She sent me a photo, and I got angry and blocked her. I forgot to save the photo, and then she withdrew it. I don't have any evidence. Do you believe it? Okay, it doesn’t matter if you don’t believe it, I’ll inform you anyway.”
Gu Nianzhi twitched the corners of his lips, thinking that Wen Shouyi was considered a figure, and with such a close eye on him, did she know that he was testing her and her parents' DNA
Gu Nianzhi rolled his eyes and said, "Is it convenient for you to talk?"
"I'm in the car." Xie Qingying looked outside the car. It was getting very late and she was almost home.
"Oh, let's send text messages then." Gu Nianzhi said with a smile, "You can be more detailed."
"Isn't it convenient for you to talk?" Xie Qingying couldn't help but asked tentatively, "Am I still disturbing you?"
"No, I was watching other people do experiments. It was very interesting." Gu Nianzhi said with a smile, hung up the phone, and sent a text message to Xie Qingying.
Gu Nianzhi: [When did Wen Shouyi send you the photo? What does it look like? Can you roughly describe it?]
Xie Qingying heard that Gu Nianzhi was watching others doing experiments and didn't believe it at all.
Where can I watch the experiment on the fifteenth day of the first lunar month
But she didn't say much, and just sent the screenshot of Wen Shouyi's withdrawn photo to Gu Nianzhi.
Gu Nianzhi looked at the time when Wen Shouyi withdrew the photo, and quickly replied: "It's not too late, I will teach you a way to display the photo that the other party has withdrawn."]
Because the operation of undoing the photo does not mean that the other party actually deleted the photo from your phone in time, but replaced the previous photo information with a predetermined message.
The photos sent by the other party are actually still in the cache on your phone. Most people don't know how to retrieve the photos from the cache.
The photos will actually disappear after the phone clears its cache.
It had only been a few minutes since Gu Nianzhi saw Wen Shouyi withdraw the photos. Xie Qingying's phone cache must still have the photos Wen Shouyi had withdrawn.
Xie Qingying was particularly surprised: [Can the withdrawn news be restored? !]
Gu Nianzhi smiled and nodded: [Okay.]
Then he sent a series of instructions to Xie Qingying and asked her to follow them.
Xie Qingying is an Apple phone. Retrieving photos from the cache is a little more difficult than Android systems. Generally, a jailbroken version is required to do it.
But with care, these are not problems.
While she was there, she learned a lot of practical hacking knowledge from Zhao Liangze.
Jailbreaking Apple phones is just a routine operation for hackers.
Xie Qingying followed Gu Nianzhi's instructions and operated on the phone step by step, as if opening the door to a new world.
When she retrieved the two photos that Wen Shouyi had withdrawn from her phone's cache, she was already in awe of Gu Nianzhi.
This little girl is really amazing.
Beauty and brains coexist, and her body and figure are both graceful. No wonder He Zhichu still has feelings for her...
Xie Qingying was determined to stay away from Gu Nianzhi, and with complicated emotions, she saved the two photos in her phone and forwarded them to Gu Nianzhi.
Then he replied: [I have something else to do, just to remind you.]
[Happy Lantern Festival.]
Gu Nianzhi also replied: [Happy Lantern Festival.]
Xie Qingying closed the dialog box and looked up to see that the car had parked in front of her home.
"Qingying, are you okay?" Xie Qingying's best friend got down from the driving position, opened the door for her, and helped her get out of the car.
Xie Qingying's drunkenness had almost dissipated. She smiled and nodded to her best friend, "Thank you. Go and accompany your boyfriend. I'll go back and take a nap."
Her best friend sighed, "I'll help you in before you leave."
Xie Qingying was helped into the room by her best friend, where she washed herself casually and went to bed.
But she couldn't sleep and was in a state of excitement.
After her best friend left, Xie Qingying took out her mobile phone and started calling He Zhichu.
But He Zhichu had been working and didn't answer her call.
…
Gu Nianzhi held her chin, looking at the photos on her phone in trance.
Lu Jin set up the instruments and asked them to start testing the full DNA sequence of Wen Dayou and Liang Meili.
Turning around, he saw Gu Nianzhi holding his phone in a daze.
"What's wrong? Who called just now?" When Lu Jin went to work, he was very focused and paid little attention to the things around him.
Gu Nianzhi frowned and raised his head, showed the photo on his phone to Lu Jian, and wondered, "Look, how could this be taken secretly? I think the quality of the photo is pretty good, but I can't tell where the person who took the photo is."
If we can find the location where this person took the photo, and then check the nearby surveillance cameras, we should be able to follow the clues and find evidence of Wen Shouyi's crime.
But she looked left and right and couldn't determine the location of the person taking the photo.
Lu took a close look and said, "From the perspective of the photo, it was taken from the side and above. This angle is a bit strange and it doesn't look like an ordinary digital camera."
He pointed to Gu Nianzhi's computer and said, "Send me the photo and I will analyze it for you."
"Okay!" Gu Nianzhi cheered up and quickly sent two photos to Lu Jin.
Lu Jin turned on his desktop computer, which was comparable to a central server, and opened the photos with mathematical analysis software.
Soon, this flat photo became three-dimensional on the computer screen near Lu.
People, objects, and surrounding buildings all stand clearly on the screen.
Lu Jin pointed to the picture on the computer and said: "Using this model, we can calculate the specific position of the shooting lens from the angle of the character display."
"Can this be deduced?!" Gu Nianzhi was extremely surprised, and his black pupils looked at Lu Jin as if he could speak.
Lu Jin smiled proudly and clicked the mouse twice on the computer screen, "Of course it can be calculated."
"Do you know the experts who analyze gun ballistics? They can tell what type of bullet it is and what type of gun it shot from a bullet hole."
"Better ballistics experts can even pinpoint the specific gun from which the bullet was fired."
"We also use this principle to calculate the location of the person taking the photo."
"This person used an optical lens to take photos, and the photos were developed on film, which increases the difficulty of tracing."
"If he had used a digital camera and this photo was a digital image, it would not take me a second to locate his location."
Lujin shook his head regretfully, "But now, I have to model his photo and then perform calculations from the angle of light projection to find the end point of the light, which is where the person was when the photo was taken."
"Don't you have surveillance in the community? Can you call it out and take a look?" Gu Nianzhi said quickly, "Maybe he is under surveillance."
Lu Jin shook his head, "You can go watch the surveillance, but don't have high hopes. Looking at the angle and the quality of the photo, I feel like he used a telephoto lens to shoot here from a tall building in the distance."
Therefore, it is impossible for the surveillance cameras around the community wall to see this person.
The optical lens also avoids being scanned by electromagnetic waves, so the person cannot be found using conventional methods.
Only someone like Lu Jin who uses complex three-dimensional analytic geometry and linear algebra to perform modeling calculations can accurately find out his location.
Gu Nianzhi watched with admiration as Lu Jin was programming on the computer.
Half an hour later, Lu Jin's program was finally finished.
He pointed with the mouse at a window of a tall building on the three-dimensional model, "It's right here. That person used a telephoto lens to take secret photos of you here."
With that said, Lu Jin wrote down the man's floor and house number, "Look for He Zhichu and ask him to arrest him."
Gu Nianzhi nodded happily and immediately called He Zhichu.
At this time, He Zhichu's work had just come to an end.
He just turned his cell phone to silent so as not to be disturbed.
As soon as I picked it up, I found that there were many missed calls in front of me, and the latest missed call was actually from Gu Nianzhi.
He Zhichu was slightly startled and immediately called Gu Nianzhi back.
Just when Gu Nianzhi was about to call again, he found that He Zhichu had already called, and said quickly: "Master He, are you still working? Did I disturb you?"
He Zhichu smiled and said, "I just finished my work. What's wrong? Is there something wrong?"
"Well, something happened." Gu Nianzhi said, and sent an address and coordinates to He Zhichu, plus two photos from Xie Qingying.
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This is the second update today: Chapter 1729 "Believe it or Not".
Continuing with three updates today, I will also add an update for May’s monthly pass.
Please vote in full for the recommendation vote~~~
Third update at 8pm.
Hey guys, little angels~~~
(*°°*)