Everyone has a set of calling cards, and perhaps a phone number record sheet, which is a complex and systematic work, and the "five-finger" or "five-finger" companies go to great lengths to do these things for the sole purpose of evading detection, but only anti-detection means.

Yao Zhenhua watched the last video, but there was no reaction, his body seemed to freeze again, and he was squinting his eyes and thinking about things again.

"Team Yao, what did you think of again?"

"Oh, they try so hard to evade detection, but they don't know that the way they evade detection will also leave traces." Yao Zhenhua said calmly.

"Ah, yes, yes, Team Yao, do you mean their calling card or phone number logbook?"

"Yes, so many phone cards correspond to so many phone numbers, how to confirm the security of the number, there must be a general table, the phone numbers are recorded. In the process of use, only two conditions are met: first, the number is in the general table; 2. The first time you use it, it can be recognized as a secure phone. ”

"Team Yao, but in the course of handling the case, we haven't found physical evidence such as phone numbers and phone cards?"

"Yes, this is a problem, according to common sense, there should be this phone book, but in the Guo Jinming case, the 'Prince' case, the Shamarige case, the Huo Xiaohui case, and the Li Nan case we handled, no such book was found, why?"

Shangguan Keke did not answer.

Yao Zhenhua continued: "There is another possibility, that is, they have their own set of methods that can identify the security phone numbers of their own people! ”

"It's hard, I can't think of any way." Shangguan Keke frowned and said.

"Coco, write this down and ask them the next time you interrogate."

"Okay."

At this time, Yao Zhenhua remembered Liu Yan, because the task given to Liu Yan yesterday was to check the call records and other information of these phone numbers. Today he went out early in the morning to run errands, probably to a telecommunications company.

"Coco, you make a few more copies of these videos and give them to me."

"Okay."

"Today, you go and get a pinhole camera, the kind that has a backup battery, the kind that can be used even if the power is off. Mounted in the hallway, facing the door of our team's office. "If not, you and Liu Yan can find a way to buy one or make one."

"Okay." Shangguan Keke replied while taking notes.

"Team Yao, is there anything else?"

"Not for the time being, do you have something?"

"Yes. My mother just said that let me get off work and invite Aunt Yao to the reunion banquet in the evening, I don't know what you mean? Shangguan Keke asked resignedly, a little worriedly.

"Uh, Coco, don't go. My mother didn't participate in such an event, and besides, her old man has experienced a lot of things this year, and now she is in the festival period, it is inevitable that she will be disappointed and sad, and it is best for us not to let her participate. What do you think? ”

"I support your opinion. Letting Auntie live peacefully is the greatest happiness created for her! ”

"Well, Coco, you've grown up."

Shangguan Keke glanced at Yao Zhenhua and did not speak.

Shangguan Coco copied all the videos that Huo Hui secretly shot in the Happy Teahouse in five copies, all of which were stored on mobile hard drives, because the amount of data was very large, there were more than a dozen gigabytes of data, and it was difficult to store all of them on CD-ROMs and ordinary USB flash drives.

Then, Shangguan Keke handed over all the five mobile hard drives to Yao Zhenhua. I went to the logistics office to get a pinhole camera, but there was no storage power, so I put it in the office for the time being, waiting for Liu Yan to come back, and then we worked together to find a way.

Because the office was temporarily fine, Shangguan Keke went to Crown Building 9-2 to check the surveillance video.

Yao Zhenhua has been sorting out the elements of the case in the office, reasoning about the case, making lists, drawing pictures to demonstrate the relationship between the characters, etc., and is very busy.

Shangguan Keke came to 9-2 of the Crown Building, startled, and saw a man with long hair and red clothes sitting on a stool with his back to the door, and she suddenly "chuckled" in her heart, "Is the base occupied?" "Who is this person?

"Who'?!!!"

Maybe Shangguan Keke's voice was loud enough, and the man was still wearing a headset, but he seemed to hear the sound and turned around.

"Sister Coco! What are you doing here? ”

"Ahh Youhua! ”

Shangguan Keke couldn't cry or laugh, why did this girl come here, and she made such a look, fortunately she didn't bring a gun, otherwise what if she got a headshot.

"Youhua, what kind of style are you?"

"The rubber band that blew my hair was broken, and I couldn't tie my hair for a while, that's why it's like this. What, is it scary? ”

"It's not scary."

"That's good."

"It's scared to death!"

"Ahh

"You go and look at yourself in the mirror, or you have your back to me, wearing a red coat, you know, who is the most scary?"

"I don't know, it's almost scary, right?"

"It's at a time and place where no one should be, and suddenly a woman dressed in red and standing in front of you with a pink face."

Youhua nodded and said, "It seems to be." ”

"Aren't you on vacation, why are you here?"

"My parents only arrived in the afternoon, I was bored, and I thought that you were very busy today, so I came here to check the monitoring."

"Well, yes, very responsible. Although it scared me, Team Yao will definitely be happy to know that you are so responsible. ”

"Well, my master is happy and satisfied."

"Hehe, girl, do you want me to give you the calculation to scare me?!"

"Don't, sister, little sister doesn't dare."

"Don't be poor, tell me how much you've seen and if you find it?"

"I'm almost done, and after my review, no one has been in or out of the nightclub since the city bureau closed it."

"No news, not good news!"

"Indeed, if there is news and situation, we will be able to follow up, and maybe we will be able to advance the process of solving the case."

"Let's watch it together, I hope to finish it soon, we have to go to the reunion banquet together in the evening, maybe the two of us will go to the hotel to prepare."

"Okay." Gao Ming had already told Youhua about the year of the group, so she didn't think Shangguan Keke's words were anything strange.

……

After four o'clock in the afternoon, Yao Zhenhua suddenly received a call from Qian Feng, asking him to hurry to the director's office.

Yao Zhenhua came to Qian Feng's office and saw his sad face, could it be that there was something going on in Xishuangbanna? So he said: "Money Bureau, what's the matter?" ”

"Banna didn't catch Xue Jin on their side, they withdrew first. However, there is a detail that my classmates have informed me of an important matter, that since the process of rounding up and setting up the cards, there is a mysterious force that is causing them trouble, and they have blown out the tires of their police cars in different ways. ”

"What's the way? Was there a shooting? ”

"There were nails, thistles, bullet shots, especially bullet shots, since they could shoot tires, they should be able to lock on to the police officers at the time, but why didn't they hurt the officers? Their purpose is not to hurt people, but to save people and save Xue Jin. ”

After Yao Zhenhua heard this, he also frowned slightly, and said, "It's a bad thing, the reward may be effective." ”

"You're talking about 'Zhe Yanfang's bounty'?" Qian Feng asked.

"Yes. In my judgment, the domestic killers will not be so crazy, it is very likely that it is the power of Zhe Sangzi's side, maybe it is a force similar to the "international team". ”

"They just want to save Xue Jin?"

Qian Feng thought that they had taken too much risk for the sake of a Xue Jin.

"Money Bureau, Xue Jin is not an ordinary person. First, Xue Jin should be a member of the 'Five Fingers', and based on this, all the members of the 'Five Fingers' will save him; second, Xue Jin is a person in the trenches of them, and if Xue Jin is caught, it will be bad for them; third, and perhaps the biggest reason, Xue Jin is a local and a member of the 'Five Fingers', if Zhe Sangzi rescues Xue Jin, then will Xue Jin help him save his daughter, Zhe Yanfang? For Zhe Sangzi, saving her daughter is the most important thing. ”

"Makes sense. Although I am not sure whether it is an international criminal who has infiltrated the country, I will report this to the ministry as a precaution. ”

After Qian Feng finished speaking, Yao Zhenhua didn't answer, they were all thinking about the problem. Qian Feng was thinking about how to tell the provincial department about this, while Yao Zhenhua was thinking about what the purpose and goal of those people were.

The silence was broken by Yao Zhenhua's phone ringing, "Hey, Liu Yan, what's the matter?" ”

"Team Yao, I'm back and retrieved the call information records of the suspect's mobile phone number."

"Okay, you wait for me in the office, I'll go over to you right away."

Yao Zhenhua said goodbye to Qian Feng and went back to the office.

In Liu Yan's office, Liu Yan was waiting for Yao Zhenhua.

Liu Yan pointed to a pile of materials on the table and said: "Team Yao, these are the information materials of the phone numbers I used to obtain the suspect, I have initially checked some of them, and found that the handlers of these numbers are all over the country, I guess that this is the phone card they handled through the identity number of the Internet sale, and these phone cards all start with 177." ”

"What's even stranger is that these phone numbers call each other once, and none of them more than once."

"Well, your findings are useful and corroborate some information." After Yao Zhenhua listened to Liu Yan's report, he was a little happy in his heart, because this was consistent with the ideas reflected in the video he and Shangguan Coco viewed.

"By the way, Liu Yan, do you have a way to make or buy a surveillance camera with a power storage function, that is, a camera system that can still work normally in the event of a sudden power failure?"

"I can do it, but I can't do it without a big enough battery, so I suggest buying a battery and I'll design them together."

"Okay, I'll leave this matter to you and Shangguan Keke, and it will be completed before the third year of junior high school."

"It can be done!" Liu Yan said and nodded.

"Liu Yan, you've been running for a day, it's been a hard day, it's a little more than five o'clock, you take a break, and in a while, we'll go to dinner and have a reunion dinner."

After speaking, Yao Zhenhua patted Liu Yan on the shoulder and said, "Good job!" Sort out the materials before leaving. ”

"Okay, Team Yao."

Yao Zhenhua left and called Shangguan Keke and asked her to count the number of people in the regiment.

At six o'clock in the evening, after work, Liu Dong, Hao Chunxiao, Daxiong, and Yi Siming also completed the send-off procedure and came back.

Yao Zhenhua led Liu Dong, Hao Chunxiao, Daxiong, Yi Siming, and Liu Yan to attend the first reunion banquet of the three teams.