The large functional conference hall of the Provincial Department Graphic Investigation Corps, the monitor screen here is 84 inches spliced, and the entire conference room is covered with screens on one wall, and they can connect to the Tianyan cameras in various cities and regions of the province at any time.

Xu Zheng led the members of the special team to come over, just to monitor suspicious people through this giant splicing display.

There are nearly 200,000 cameras controlled by the police in Changming, and so many cameras, let alone a dozen of them, can't be seen even a hundred times more.

Therefore, Xu Zheng and the others only check the cameras at highway intersections, airports, railways and other traffic intersections and security checkpoints, and their main job is to identify Qiao Keyuan and Yan Hongqiang.

Because he was worried about Qiao Keyuan's disappearance, Xu Zheng arranged in advance for the Internet police technical department to temporarily add an analysis program to the Tianyan system.

is to compare the ears of all the women who appeared on the surveillance camera, and of course Yan Hongqiang. No matter how clever the disguise technique is, it will not adjust the ears, and the human ears are the same as the fingerprints, they are unique, and they can also be used instead of fingerprints to determine a person.

It's just that there is one thing that is difficult to do, that is, if Qiao Keyuan wears a hat and has hair covering her ears, she will not be able to recognize it.

In this case, we can only rely on colleagues who set up cards at the intersection to find a way to take pictures and identify them. Xu Zheng also asked people to contact the city's taxi company, and set up a voice recognition program in their walkie-talkie system, if Qiao Keyuan takes a taxi, as long as she speaks, the voice will be automatically recorded into the system for identification, and if it is matched, it will naturally be possible to locate her location.

It's a pity that those online car-hailing companies use platform software, and there is no sound interaction system, so this voice recognition program can't be used.

In addition, Xu Zheng also asked Dai Ruhai of the special police team to contact the city's special police detachment and special police brigade to be on standby in various districts at any time, and if Qiao Keyuan's location is discovered, he will ensure that he will arrive at the scene within five minutes.

A leader of the graphic investigation team was very cooperative with Xu Zheng's work, watching them arrange one by one, and it was an ear recognition program, a sound recognition program, and the recognition function of the Tianyan system, which can be regarded as a comprehensive search for the target person.

"Team Leader Xu, I have opened my eyes today, and these small programs have been used to the extreme." Xu Zheng smiled bitterly: "Mr. Zhang, I am also holding chicken feathers as an arrow, all the leaders of various departments give face, you see, I want to use the program to identify ears, the Internet police did not say a word and directly sent more than a dozen technical police to support." Look at you again, didn't you also transfer forty or fifty detectives to me? Without the support of a leader like you, no matter how capable I am, I wouldn't be able to complete the task. "Zhang Xiangwen is only about forty years old, and he has become the deputy chief of the graphic investigation team, relying not only on relationships, he has made a lot of contributions to the identification of graphic reconnaissance.

"The Sky Eye system is good to use, but it also has flaws, like you match the ears of the target person this time, this is a good idea. But the cost is also large, you see, without the help of so many technical police, this ear recognition program can't run, right? Xu Zheng understood what he meant, the Tianyan system is networked nationwide, and its servers are no less than those used by Taobao and Jingdong, which are all money, and if you add an ear recognition program temporarily, you will have to add hundreds of thousands of costs overnight.

And that's not even counting the subsidy for the technical police. He didn't dare to calculate it, and estimated that the cost of tonight's night would be at least 500,000.

The same is true for taxi companies, which are rented by several companies and run a walkie-talkie system, the cost is evenly shared, and it doesn't add much cost to help the police add a voice recognition program temporarily.

Xu Zheng and Zhang Xiangwen stood in the corner of the hall and chatted for a while, and then they were called by Gao Fangben of the Criminal Investigation Corps.

"Team Leader Xu, come on, we have made a discovery."

"Mr. Zhang, let's go, let's take a look." When Xu Zheng rushed to the map detective that Gao Fangben said, he found that the electronic real-world map displayed on her computer screen was very familiar, good guy, isn't this the street near their home, behind the public security family courtyard?

The detective was an eldest sister in her thirties, and when she saw Xu Zheng coming over, she quickly explained,

"The camera at this intersection just now identified the back of a woman, and the contrast similarity of her ears was up to 82.19%, triggering the alarm system. I immediately monitored the woman's route and several other shots did not capture her face, mainly because she was wearing a hat. Xu Zheng was very happy to match his ears, but the investigators monitored that the woman finally walked into the public security family home, and he was worried again.

"Eldest sister, you find out a few shots of this woman for me, I'll take a look." The eldest sister skillfully took screenshots of the camera, and saw that some shots were a bit ambiguous.

"Team Leader Xu, do you want me to refine these screenshots?" Xu Zheng stopped her and smiled confidently,

"Thank you, eldest sister, no need, I'll just recognize it with the naked eye." When the eldest sister saw Xu Zhengxiao's confidence, she came back to her senses, and she almost forgot that the person in front of her was a well-known analog portrait expert.

After looking at two screenshots, although the woman was wearing a hat, she could still see clearly below her nose, and she could be sure that this woman was not Qiao Keyuan, and the way she walked was not right, he waved his hand in disappointment,

"Eldest sister, you go on, this woman is not." For Xu Zheng's judgment, Zhang Xiangwen and Gao Fangben naturally have no objections, in terms of recognizing faces, the young man in front of him can definitely be called the first person in Changming, they have no doubts at all,

"Team Leader Xu, what are you going to do if the target person has long hair in a shawl, covers his ears, and doesn't take a taxi or go out of the city?

Faced with Zhang Xiangwen's question, Xu Zheng smiled and said: "If one plan fails, I will use another plan, if I can't catch Qiao Keyuan today, I still have two tricks, I want to capture the old indulgence and lead the king into the urn..."

"And then?" Zhang Xiangwen saw that Xu Zheng stopped in the middle of speaking, and immediately asked. Zhou Fangben is a big man in the Northeast, and he hates others being unhappy the most, so he sprayed directly at Xu Zheng's face: "You kid will sell Guanzi, if there is something to shake out, won't it be over, and the whole set is still in a set, if you are like this, my brother will ignore you." ”

"Brother Zhou, you can't blame me." Xu Zheng was also aggrieved, he hurriedly distanced himself from Zhou Fangben, this brother should be on fire, bad breath,

"I reported to the leaders, but they didn't let me say it, saying that there was really no way to implement it. Why don't you go and ask Mr. Liao? "The person who can sit in the position of deputy chief of the criminal investigation team has a kind of majesty, Zhou Fang didn't dare to look for Liao Hai, he glared at Xu Zheng,

"Find Mr. Liao, forget it, brother should endure it for another night, you kid too, if you can't say it, don't sell it."

"Well, isn't it the end of the story?" Xu Zheng knew that Zhou Fangben had a bold personality and would not really be angry with him, but he quickly explained to Zhang Xiangwen,

"Mr. Zhang, the task has to be kept confidential, I hope you understand." Zhang Xiangwen nodded in understanding, waved his hand, and asked Xu Zheng and them to be busy with work first.

At this meeting, forty or fifty map detectives in the entire hall plus more than a dozen people from the temporary special team all made discoveries one after another, but the highest similarity of the ears found was only 90%, and after Xu Zheng personally identified it, he judged that it was not Qiao Keyuan.

In addition to the suspected Qiao Keyuan, there is naturally Yan Hongqiang, but unfortunately, after Xu Zheng saw it, they were not the real ones, he turned his head and asked Zhou Fangben,

"Brother Zhou, have your colleagues in the railways and highways replied?" Zhou Fangben looked at his phone, shook his head, and sighed,

"I guess Qiao Keyuan, they haven't seen the fake news that they were arrested."

"It shouldn't be possible." Xu Zheng said firmly, thinking that Qiao Keyuan must be approaching Yan Hongqiang with a mission, then she and Yan Hongqiang have been hiding for almost two months, and they must have to contact the organization behind her.

"If Qiao Keyuan doesn't come out today, it means that she has seen through my plan today." Zhou Fangben looked at the time, it was already eight o'clock in the evening, at this time, the sky was finally darkened, and the camera at the intersection was blessed by the street lights, and the visual distance was also shortened by twice as much as that of the day.

"Let's wait and see, but, after twelve o'clock, if you can't identify it again, then..." After the early hours of the morning, the number of pedestrians on the street plummeted, and Qiao Keyuan chose to come out at this time, and the risk was much higher than eight or nine o'clock in the evening.

Xu Zheng also had a headache,

"It's not a needle in a haystack to find two people in a huge city, and the leaders are not allowed to mobilize the citizens of the city, otherwise..."

"You are talking nonsense, how can you allow us to mobilize the citizens, by the way, is there any news from the entry and exit detachment?" Xu Zheng looked at his phone, but he didn't receive a call, and WeChat didn't respond.

"It seems that the people who flew directly from abroad today are very honest and have not found any other abnormal situations in them." For these foreigners, it is naturally impossible to monitor the whole process, you can only check their check-in information to infer it, and from this point, it is difficult to find out who among these people will contact Qiao Keyuan.

The two chatted about the situation while waiting for a miracle to happen, but unfortunately, until more than ten o'clock in the evening, there was still no good news, the ear recognition system did not match, the voice recognition system did not make any contributions, and the Tianyan system could not recognize Qiao Keyuan and Yan Hongqiang.

The police on duty at railways, highways and other checkpoints did not find the target person. At this time, the patrol police, special police patrols, and public security brigades of various police stations should really be allowed to sweep the streets, but unfortunately the leaders above did not agree.

Just when Xu Zheng was disappointed, Long Chuchu suddenly jumped up and shouted to Xu Zheng excitedly: "Director, come and listen, there is a female passenger in a taxi here whose voice is more than 80% similar to Qiao Keyuan..."

"Master, go to the Consulate General of the Lion City in Changming..."