Guan Zheng is like an encyclopedia: "The Doppler effect is named in memory of the Austrian physicist and mathematician Christian John Doppler, who first proposed this theory in 1842. The main content is The wavelength of the object radiation changes due to the relative motion of the wave source and the observer.
In front of the moving wave source, the wave is compressed, the wavelength becomes shorter, and the frequency becomes higher; when behind the moving wave source, the opposite effect will be produced. The longer the wavelength, the lower the frequency; the higher the speed of the wave source, the greater the effect. According to the degree of wave shift, the speed at which the wave source moves in the direction of observation can be calculated. "
"Speaking of people!" Xu Jiuyan didn't have the time to listen to these messy things.
Guan Zheng explained: “For example, when an ambulance comes oncoming, the sound is getting louder and louder; when the car is leaving, the sound gets lower and lower. You may not realize that this phenomenon and The color Doppler effect used in hospitals belongs to the same principle."
"Didn't I know if you said that earlier? I found it, and there are twelve places that meet the requirements." Xu Jiuyan's work efficiency is still very high.
Guanzheng was still a bit disappointed. Although there were only twelve places, it would take at least a few days to investigate them one by one. Fatty Qian couldn't wait at all.
Xu Jiuyan put on her headphones and listened to the noise. Why couldn't she hear anything? Xu Jiuyan said somewhat discouragedly: "Why can't I hear anything?"
"That's because you have no experience." Guan Zheng randomly began to ponder: Why was he kidnapped? Where was kidnapped? What is the purpose of the kidnapping? Why is no one asking for a ransom
Xu Jiuyan's tacit understanding with Guan Zheng is getting higher and higher. Xu Jiuyan left Fatty Qian in the walking route after leaving the police station, but a hand was left in the video.
Xu Jiuyan pushed the computer to Guan Zheng and said, "Look at this, is this hand hurt?"
Guanzheng nodded and said, "Yes, but where does the hand come from?"
"It was found in the video of Fatty Qian being kidnapped. He didn't see his face, only one hand."
Guan Zheng looked at the hand and said, "It looks like it was scratched by a sharp weapon. But how do you judge that this is the kidnapper's hand?"
"From the previous point of view, this person is avoiding the camera, and the sneaky person must have no good intentions!"
Guan Zheng blinked and said, "Although your reason is one-sided, your inference is correct."
Xu Jiuyan lay on the table and said, "We don't even know where the hostages are now. How can we arrest people?"
"Who said we didn't know? We are looking for it." Guan Zheng was saying, Guan Nuo received a new video here. The Fatty Qian in the video is even more dangerous, his face turned purple.
Guan Zheng also became more anxious and asked, "Has the IP address been found?"
"I checked. In New Zealand, he hijacked Internet IP addresses all over the world. Any files sent wantonly will not be traced to the real address. Sorry, I didn't help you."
Guan Zheng patted Guan Nuo on the shoulder and said, "It's normal, don't blame you. If this address was so easy to find out, we would have caught this person long ago, and still use it until now?"
The phone in the office also rang. Xu Jiuyan, the officer in charge of Guanzheng, went to answer the phone. Xu Jiuyan took Guanzheng a look and said, "You really treat me as a secretary?"
Xu Jiuyan answered the phone in an angry tone: "Interpol Brigade of the Municipal Public Security Bureau."
"Hello, we are the Economic Investigation Brigade. The insurance bills and insurance policies you provided have been analyzed here. Can you come and fetch the summary report? Our staff is really not enough."
Xu Jiuyan came to her energy instantly and said: "Okay, I'll go right away."
Xu Jiuyan put a stack of papers on the table, and Guan Zheng asked, "How do you say?"
"The bill is normal, and the policy is legal."
Guan Zheng took a deep breath, again! Guan Zheng knew that if this dragged on, Fatty Qian would have no chance of survival. He stood up and said, "Li Chongyang, Xiaoquan'er, Lao You, Jia Zhenkai, you guys go to visit and look at the twelve on this map. Can the place be narrowed down and the location can be determined as soon as possible. Guan Nuo continues to extract environmental sounds and screen clues. Xu Jiuyan and I will go to the insurance company again."
Guan Zheng and Xu Jiuyan went to the insurance company, but the scene they faced was still an office area with a few employees. Guan Zheng pulled a cleaner and asked, "How many people are in your company?"
"Um, plus the general manager there are 27 people."
"27? Are you sure?"
The cleaner said firmly: "Of course, do I have to lie to you?"
Xu Jiuyan was a little bit unbelievable. The registration license clearly stated that there were 270 people, but what about this employee? Why did it become 27 people
Guan Zheng said: "It seems that this insurance company still has a lot of things we don't know."
"Yes, the salesman last time was also tricky, right?"
Guan Zheng nodded and said, "You just know? The reaction is slow!"
Xu Jiuyan rolled her eyes and said, "Only you are great!" Xu Jiuyan went to the receptionist and said, "Girl, I want to buy insurance."
The receptionist smiled and said: "Okay, we will have an excellent salesman to answer you."
Within a few minutes, a thin man came out. This thin man was really ugly, with two cheekbones rising high, and thick lips like a monkey with a big mouth.
Xu Jiuyan sat down with Guan Zheng and said, "I want to buy insurance."
"What do you want? Accident insurance? Medical insurance? Or property insurance, personal insurance, liability insurance, credit insurance? Or allowance insurance, marine insurance?" Not interested, Xu Jiuyan listened and said, "I want personal insurance, preferably the one-stop insurance for children and grandchildren."
The big-mouthed monkey showed a cunning look in an instant, and said, "Madam, you are right. This one-dragon child and grandchildren is the most popular insurance here. Think about it, you bought an insurance. As long as you pass away, I No other meaning, just give an example. Whether it’s accident, disease, or whatever, you are the only one who died anyway. Your husband, I’m sorry, it’s your husband, and the children will inherit yours. Insurance, they become beneficiaries. And it’s passed on."
If Xu Jiuyan was an outsider, she would almost believe it, and the big-mouthed monkey said after a meal, Xu Jiuyan would be a little tempted.
Xu Jiuyan nodded, praised again and again, and said, "How much is this insurance?"
"3 million, you are not at a loss. Think about it, if you leave, your children and grandchildren are still benefiting!"
Xu Jiuyan asked back: "Isn't it 2 million? Has the price increased again?" (End of this chapter)