Chapter 941 Difficulties!

After hanging up the phone, Xie Chenglong was complacent.

Li Mu and Wei Lan played a good show that had no script, but had a good heart and tacit understanding, which made Xie Chenglong feel very real.

Even if Xie Chenglong has more criminal experience, this kind of kidnapping is the first time, and he asked for hundreds of millions of ransoms as soon as he opened his mouth. Such a large amount is completely beyond his ability to control, so that the whole situation has been out of control. He hadn't noticed it yet.

Many people have an upper limit on their ability to control. In the shopping mall, some entrepreneurs can plan perfectly if they give him 1 million. Every penny can be spent on the edge of the knife. The reason is that his strength is not enough to control the overall situation of 10 million, so under the leadership of such a person, the company basically cannot survive the B round;

In the military, there are many officers and generals who lead troops of several thousand people, interspersed and lured the enemy to penetrate deeply. He fought very well and was very handy, but he really let him lead the army and plan how to coordinate the infantry and artillery, attack and encircle them, and encircle the points for reinforcements. Often, he will fight in a mess, because he has the upper limit of his ability, which is suitable for an army of several thousand people.

Compared with Xie Chenglong, who has no criminal experience, Li Mu, who has no criminal experience, has no advantage in crime itself, but in terms of controlling the overall situation, he is countless times stronger than Xie Chenglong, and even the momentum of his speech is completely Press him.

It was precisely because Li Mu controlled the rhythm just right, and Wei Lan was extremely smart. Following Li Mu's rhythm, he didn't say the two words he was holding back until the end, which was just right.

Xie Chenglong didn't know that Li Mu already knew the mastermind behind the kidnapping of Wei Lan at this time. He hung up Li Mu's phone and cut off the battery of Wei Lan's mobile phone. He had heard about signal positioning. A few minutes after the phone was turned on, the police could calculate the approximate location of the mobile phone based on the signal strength of each base station. Although he did not know whether Li Mu would call the police after hanging up, he did not dare to take this risk.

The battery of the mobile phone was removed and put in his pocket, Xie Chenglong said to Wei Lan in a flat tone: "It's a good cooperation, tomorrow at twelve o'clock, I will let you talk to him again, and no one will disturb him during this time. You, but you also give me honesty, don't make any demon moths."

Wei Lan knew that with Li Mu's wisdom, she must have received the message she conveyed, so she had already kept the clouds open to see the moon, and she couldn't hide her excitement and nodded to Xie Chenglong again and again.

Xie Chenglong misunderstood Wei Lan's excitement, and even laughed in his heart, this woman is really stupid, do you really think that Li Mu promises to give money so that you can survive? Don't be naive, you can see my face, no matter if you can get the money or not, you can't survive.

However, it is also a good thing to let her continue to have some hope of life. As long as she feels that she has a chance to survive, she will actively cooperate with herself to get the money.

Thinking of this, Xie Chenglong felt very at ease, pushed the door out, and said to the two men who were guarding the door, "Keep me guarded, but without my permission, none of you are allowed to go in and disturb. Do you understand?"

The current Weilan is a golden Bodhisattva worth over 100 million. Xie Chenglong must not allow anyone under his command, not even Song Zhilei, to have any unreasonable thoughts about her before getting the money.

The two subordinates also knew Xie Chenglong's ruthless and ruthless character, and nodded quickly: "Sixth brother, don't worry, we will not go in and disturb..."

Xie Chenglong nodded with satisfaction: "After this is done, brothers eat spicy food, I will take you to the south, and then you can find any woman you want!"

...

Li Mu hung up the phone and didn't call the police immediately. He knew in his heart that although it was necessary to call the police, he absolutely couldn't call the police through normal channels.

The normal channel to call the police is that the people below know first, and then convey it up step by step. The way of information transmission is like an inverted pyramid. In this way, the information spreads too much, and I can’t control it at all. In case the robbers know , will definitely increase the danger to Wei Lan.

What Li Mu thought was that now he knew that the mastermind behind the scenes was Song Zhilei. Next, he had 48 hours to find Song Zhilei, and if he found him, he would be able to find Wei Lan.

As for how to find a Song Zhilei in the vast crowd, he had to rely on the special affairs of the public security department. Li Mu knew that the capabilities of the state machine were far beyond his imagination, so he had to rely on the government at this time.

Li Mu only had time to check the text messages from another mobile phone. Song Liang sent Li Mu three messages: "I'll be there soon!", "What is the specific situation?", "What do I need to do now?"

Chen Ze replied two words to Li Mu: "Grass! I'll go right away!", "I called Gu Gu of the Municipal Bureau, he is already on his way to Taobao!"

When Li Mu saw that Chen Ze had found the head of the city bureau, he felt a lot more relieved. Chen Ze was worthy of being a son of the official family. This kind of thing is very clear that the relationship should be sorted from top to bottom. , and then let him carefully select elites with strong ability and quality to cooperate in the detection, and the case will naturally be much easier to handle!

Leader Lei and Senior Brother Liu have been listening to the side, and naturally they could hear what happened. The two hurriedly asked about the specific situation. Li Mu gave them a general idea. They all sighed: "Wei Lan is really a wise woman, she revealed the most crucial clues in two sentences!"

Li Mu said, "Then we will see how to save people."

Brother Liu asked him, "What are your plans?"

Li Mu said: "To seek help from the Yanjing Municipal Bureau, but you have to find senior leaders first, who will directly assign elite personnel to solve this case."

Ten minutes later, Song Liang arrived first.

As soon as he entered the door, Song Liang couldn't wait to ask Li Mu, "What's going on?! Did the kidnapper contact you?"

Li Mu nodded. Just as he was about to introduce the situation, Gu Bureau, who lives in the city, also arrived.

As the head of the city bureau, Gu Ju was really uneasy on this journey.

To be honest, Quan Yanjing didn't want to deal with Li Mu the last time, because he was a police officer, and Li Mu had nothing to do with him, but if something went wrong, he would take the blame.

It's been a long time since I didn't have anything to do with Li Mu, but I didn't expect that he fell asleep today. Chen Ze called and made his nervous heart beat wildly.

Wei Lan was kidnapped. Although this woman doesn't know much about her, she has heard about her. She used to be a well-known real estate developer in the Shanghai stock market, and now she is the partner of Li Mu and Chen Ze in Wanying Real Estate.

Li Mu himself was difficult enough to communicate, and Chen Ze was involved again. Together, the two brought a lot of pressure to him.

The kidnapping case is a very serious criminal case, and it is also a case that is very likely to have a bad social impact. With these two young gods involved, Gu Jianghe is really anxious.

As soon as Bureau Gu arrived, he hurriedly asked what happened. Li Mu called Chen Ze, and after hearing that he would be there in five minutes, he said to Bureau Gu and Song Liang, "Everyone, wait a moment, wait for Old Chen. I'm here, and I'll tell you about the situation."

Gu Ju was very uneasy, and couldn't help but say, "Mr. Li, do I need to arrange the troops in advance so that all the people in the city bureau can move?"

Li Mu said: "Now we can't let the information spread too much, so let's Gu Bureau, please call and find a few elites in criminal investigation to come here in plain clothes. I'm afraid that some kidnappers are watching me secretly. If they find me at this time. The City Council will definitely give them a great sense of urgency.”

Song Liang, who is experienced in society, also nodded and said, "It's better for Li Mu to stay here and not move. If possible, please Gu Bureau, please organize a special task force yourself, and the headquarters will be selected here."

Gu Ju thought about it too. If the kidnappers really stared at Li Mu's every move, then he naturally couldn't have any direct interaction with the police. Li Mu was not far from the city bureau. For example, he could simply set up a headquarters here.

As a result, Bureau Gu immediately called a few very experienced criminal investigators in the city bureau system. After half an hour, all of these people brought their most trusted subordinates to Li Mu's office to discuss the case.

Criminal investigation experts from the Municipal Bureau proposed several parallel plans. One is to immediately search for the first scene of the crime, find clues from the crime scene, and follow the clues; the other is to use mobile phone positioning to find Song Zhilei's whereabouts.

The city bureau urgently assembled a team of criminal policemen, and began to conduct investigations from the place where Wei Lan left last, namely Wanying Real Estate. At the same time, the mobile phone operators also began to actively cooperate.

The public security organs have the right to require the operators to cooperate in obtaining all relevant information about the mobile phone numbers. Gu Jianghe took this matter very seriously. He called the Yanjing leaders of the two major operators in the middle of the night and asked to immediately dispatch senior technicians to Taobao.com to do their best. Cooperate with the police to solve the case.

After one o'clock in the morning, Taobao's sales had just exceeded 300 million yuan. Yanjing, the person in charge of the two major operators, rushed to Taobao with a few nervous operators' technicians, as well as computers and other equipment. Gu Jianghe stated that he would do his best to help the city bureau solve the case.

Gu Jianghe immediately issued the first order: locate Wei Lan's mobile phone location.

The engineering and technical personnel of the mobile operator said apologetically after operating in their own background system for a while: "The other party's mobile phone is no longer on the Internet, and we can't locate her specific location."

Li Mu frowned: "What is your base station positioning logic?"

The technician said: "Mr. Li, the base station positioning logic is to contact the mobile phone through multiple base stations, and then use the signal difference between the multiple base stations and the mobile phone to determine the approximate location of the mobile phone, such as one kilometer away from point A and distance B. The distance between the three base stations is 1,500 meters, and the distance from point C is 1,800 meters. Draw a circle with the distance of the three base stations as the radius. The area where the three circles overlap is the approximate location of the mobile phone. This positioning method is not accurate enough, and the approximate error is About one or two hundred meters."

Li Mu said, "Then take a look at the base station record of Weilan's mobile phone when it was last connected to the network, and then according to your method, can you infer the specific location?"

The technician shook his head and said, "Mr. Li, our base station will not actively record the relevant information of users when they access the network, so there is no specific base station record in our background, only the record of the user's network access time."

Li Mu was very surprised: "No record? Don't your base station record the information of the devices connected to the network at this base station by default?"

The technician said embarrassedly: "To be honest, Mr. Li, your background processing is not much different from ours. You know, a device is in the urban area. With the trajectory of his daily life, he needs to make frequent calls every day. Dozens of base stations are switched, or even more. If the base station has to record every time the base station is accessed, the amount of data written is too huge, and it is difficult for our database to support such a…”

After finishing speaking, the technician explained: "Only in one case, our base station will actively record user data."

Li Mu asked, "What's the situation?"

"Roaming..." The embarrassment on the technician's face was even more embarrassing, and he said: "The reason why users do not record when switching base stations within the local area is because the amount of data written is too large, and it is also due to cost. Consider, but once the user is in a different place, the call will incur roaming charges, so in the roaming state, the base station will record his relevant information to charge the user's roaming charges..."

Chen Ze immediately exploded: "Damn it! Your operators are tricky enough! If local users do not incur roaming charges, you will not record them, and if roaming charges are incurred, you will not record them once?"

"this……"

The face of the technicians is red, and the reality is indeed the case. Enterprises also serve profits, and do not want to blindly store a large number of records that cannot generate revenue to increase additional costs and burdens.

However, Li Mu expressed his understanding in his heart. Mobile operators have hundreds of millions of users across the country. If the information of each user switching base stations back and forth every day must be recorded and written into the database, the amount of data generated every day will be terrifyingly huge. Businesses will naturally not invest so much to retain this meaningless data, and the greater the amount of data written, the greater the impact and test on system stability, so they only retain roaming data, which is in line with business and technical logic .

So, Li Mu said at this time: "Then let's not talk about this, let me ask you, since you didn't have a base station record when your mobile phone was connected to the Internet last time, it means that Wei Lan's mobile phone was still in Yanjing City at that time. within the jurisdiction, right?"

The technician nodded: "It was like this when I connected to the network last time, but now it is turned off, so I can't guarantee whether it is still in the municipal area."

Li Mu asked again, "If the other party's mobile phone is turned on and connected to the network again, how long will it take for you to locate the specific location?"

The technician said: "It will take at least two minutes."

Li Mu was also about to explode: "Two more minutes? Why?"

The technician had to explain: "When we first joined the network, we were able to get the information of the base station that was connected by default. The positioning method just mentioned requires at least three base stations to connect the mobile phone for three-point positioning. When only one base station is determined Under the circumstance, if it is an urban area, it may only be able to locate a radius of one kilometer, if it is a suburb, it may locate a radius of two kilometers or even larger, which is too imprecise..."

Li Mu asked him, "So you need more than two minutes. Only after confirming the information of the first base station that is connected by default, and then connecting at least two nearby base stations to the mobile phone, can you determine the location?"

"Yes." The technician nodded and said, "The actual situation will be more complicated. The mobile phone is only connected to one signal source at a time, that is, one base station. Therefore, in order to allow the mobile phone to connect to other base stations, we must first weaken or even disable it. Stop the signal of the first base station, and then enhance the signal of other base stations, let the mobile phone capture this signal and connect again, after confirming the base station information of the second station, then shut down this base station and enhance the signal of the third base station to After the mobile phone is connected, and the mobile phone is successfully connected to the three base stations, we can infer the specific location, which is equivalent to letting the three base stations communicate with each other's mobile phone one by one, so two minutes are optimistic estimates..."

Li Mu was dumbfounded.

Damn, I saw a criminal investigation clip on a movie before, and it took the police time to locate the suspect, and many times the suspect had just the right time to control it. When the police were about to locate him, he just hung up the phone and I used to think that these were just exaggerated interpretations of film and television works, but I didn't expect it to be so troublesome!

Li Mu asked again: "If the call time of the other party can't meet your needs at 12 o'clock tomorrow, you still can't locate a specific location, right?"

The other party nodded: "We can locate an approximate radius, but this radius may be very large. If the signal base stations are not dense enough in the suburbs, then this range will be even larger..."

Li Mu smacked his lips and said again: "Then you guys now check Song Zhilei's mobile phone number and see what's going on with his phone!"

Nowadays, most mobile phone numbers do not have a real-name system, but Song Zhilei's commonly used mobile phone numbers are four 8's leopard numbers. Immediately began to thoroughly check the roaming situation of this mobile phone number.

However, the results of the investigation were particularly disappointing: "Mr. Li, the last time this mobile phone was connected to the Internet was five days ago, and the location of the Internet connection was the local Shanghai Stock Exchange, and then the audio was lost. It should be that the device has been turned off, and it has not been connected until now. Turn it on again."

"Check if Song Zhilei has another phone number under his name?"

"There is one, and it was shut down five days ago!"

"What about his family?"

"I found his wife, and the phone was also turned off five days ago!"

There were many difficulties, and Li Mu was suddenly nervous and desperate.

What should I do if I know that Song Zhilei did it, but I can't find where Song Zhilei is? Time is running out, and the longer it drags on, the more dangerous Wei Lan will be.

The city bureau's criminal investigation team has started to dress up from Wanying Real Estate as a starting point, and began to make arrangements. Right now, Li Mu has only two recourses:

First, the criminal investigation team finds the first scene as soon as possible, and finds valuable clues along the way;

Second, at 12 noon tomorrow, when the kidnappers call to confirm, let the operator's technicians locate the base station, hoping to locate the other party's location!

...

PS: The 5,000-word chapter, this is the first watch, we will strive for the third watch tonight, and we will do our best! Ask for a monthly pass! ! !