After hanging up the phone, Xie Chenglong was proud.

Li Mu and Wei Lan performed a good show that had no script but had a deep understanding and tacit understanding, which made Xie Chenglong feel extremely real.

Even if Xie Chenglong has experience in crime, it is the first time for kidnapping. He asked for hundreds of millions of ransoms as soon as he opened his mouth. Such a large amount was completely beyond his control ability, so that the entire situation had been out of control, and he did not notice it at all.

Many people have limits in their control ability. In the shopping mall, some entrepreneurs can plan perfectly with one million and spend every penny on the edge. When they give him ten million, they will lose their way. The reason is that their strength is not enough to control the overall situation of ten million, so under the leadership of such people, the company basically cannot survive the B round;

Military, there are many officers and generals who lead troops of thousands of people, interspersed and lured the enemy into the deep. They fought very well and were very skilled, but they really wanted to lead the army and planned how to coordinate infantry and artillery, surround them, and attack and attack aid points. They often fought a lot. The reason is that his ability limit is that he is suitable for troops of thousands of people. If there are too many, he will not be able to control it.

Li Mu, who has no criminal experience, has no advantage in crime itself compared to Xie Chenglong, who has experienced crime, but in terms of overall control, he is countless times stronger than Xie Chenglong, and even his aura of speaking is completely suppressed by him.

It is precisely because Li Mu controlled the rhythm very well, and Wei Lan was extremely smart. Following Li Mu's rhythm, he said the two sentences that he was holding in his heart until the end. It was just right.

Xie Chenglong didn't know that Li Mu had already known the mastermind behind the kidnapping of Wei Lan this time. He hung up Li Mu's phone and took off Wei Lan's phone battery. He had heard of signal positioning. It is said that as long as the phone is turned on for a few minutes, the police would have a way to calculate the approximate location of the phone based on the signal strength of each base station. Although he didn't know if Li Mu would call the police after hanging up the phone, 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 plain tone: "It's a good cooperation. I will ask you to call him again at twelve o'clock tomorrow. Noon. No one will disturb you during this period, but you should be honest and don't mess with the monster."

Wei Lan knew that with Li Mu's wisdom, he must have received the message he conveyed, so he had already kept the clouds clear and the moon was bright. He could not hide his excitement and nodded to Xie Chenglong.

Xie Chenglong misunderstood Wei Lan's excitement and even laughed in his heart. This woman is so stupid. Do you really think that if Li Mu promises to give money, you can survive? Don't be naive. I've seen my face. No matter whether 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 the chance to survive, she will actively cooperate with herself to get the money.

Thinking of this, Xie Chenglong felt very relieved. He pushed the door out and said to the two men guarding the door: "Please keep it well, but without my permission, no one of you is allowed to go in and disturb me. Do you understand?"

Wei Lan is now a golden Bodhisattva worth over 100 million. Xie Chenglong must not allow anyone under his command, nor even allow Song Zhilei to have any inappropriate thoughts about her before getting the money.

The two subordinates also knew that Xie Chenglong had the same idea and his cruel and ruthless personality, so they nodded quickly: "Don't worry, brother Sixth, we will definitely not go in and disturb..."

Xie Chenglong nodded with satisfaction: "After the matter is done, brothers will enjoy delicious food and drink spicy food. I will take you to the south. You can find any women at that time!"

...

Li Mu hung up the phone and did not call the police immediately. He knew in his heart that although it was necessary to call the police, he would never call the police through normal channels.

When calling the police through normal channels, the people below first know it, and then convey it step by step. The information is conveyed in an inverted pyramid type. In this way, the information spreads too much and you can't control it at all. If the robbers know it, it will definitely add danger to Wei Lan.

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

As for how Song Zhilei should find it in the vast crowd, he has to rely on the special affairs of the public security department to handle it. Li Mu knew that the ability of the state machine was far beyond his imagination, and he had to rely on the government at this time.

Only then did Li Mu have time to check the text messages on another mobile phone. Song Liang sent Li Mu three messages, namely: "I'm here!", "What's the specific situation?", "What do you need me to do now?"

Chen Ze replied to Li Mu two things: "Grass! I'll go there right away!", "I called the Municipal Bureau Bureau Gu. He is already on the way to Taobao!"

When Li Mu saw Chen Ze looking for the top leader of the municipal bureau, he felt much more relieved. Chen Ze is worthy of being a child of the official family. He understands this kind of thing very well, and first asks the director of the municipal bureau to inform the situation alone, and then asks him to carefully select elites with strong abilities and strong qualities to collaborate in the investigation. The case will naturally be much easier to handle!

Master Lei and Senior Brother Liu were listening to each other, and naturally they could hear what had happened. The two hurriedly asked about the specific situation. Li Mu told them a rough idea. After hearing this, they not only exclaimed Wei Lan’s experience, but also sighed: “Weilan is such a wise woman. In just a few words, the most critical clues were revealed!”

Li Mu said: "Then it depends on how to save people."

Senior Brother Liu asked him: "What are your plans?"

Li Mu said: "I have to ask for help from Yanjing Municipal Bureau, but I have to find senior leaders first, and the senior officials will directly assign elite personnel to solve the 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 the hell is going on?! Have the kidnappers contacted you?"

Li Mu nodded and was about to introduce the situation. Bureau Gu, who lives in the city, has also arrived.

As the top leader of the municipal bureau, Director Gu was really nervous all the way.

To be honest, Quan Yanjing doesn’t want to deal with Li Mu the most because he is a public security officer. No matter how awesome Li Mu is, he has nothing to do with him, but once something goes wrong, he will take the blame.

Finally, I didn’t have any connection with Li Mu for a while. Unexpectedly, I fell asleep today. Chen Ze called me and suddenly made my nervous heart pound.

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

Li Mu himself is difficult to communicate with, and Chen Ze is involved. The two of them combined bring great pressure to himself.

The kidnapping case is a major criminal case and is also a case that is extremely likely to cause bad social impact. Gu Jianghe is really anxious because of these two young masters.

As soon as Director Gu arrived, he hurriedly asked what happened. Li Mu called Chen Ze and heard that he would arrive five minutes later, and then said to Director Gu and Song Liang: "Everyone wait a moment, and when Old Chen comes, I will introduce the situation to you."

Director Gu was very nervous and couldn't help but say, "Mr. Li, do I need to arrange troops in advance to make everyone in the municipal bureau move?"

Li Mu said: "We can't let the information spread too much now. This is how Bureau Gu. Please call and find a few elites in criminal investigation to come here casually. I'm afraid that someone in the kidnappers will stare at me in secret. If you find that I go to the municipal bureau at this time, it will definitely bring them a great sense of urgency."

Song Liang, who is experienced in society, nodded and said, "Li Mu is best not to stay here. If possible, please help Director Gu organize a special task force yourself, and the command center will be selected here."

Director Gu thought it was true. If the kidnappers really stared at Li Mu's every move, he would naturally not have any direct interaction with the police. Li Mu is not far from the municipal bureau, for example, just set up a command center here.

So, Director Gu called several very experienced criminal investigation veterans in the municipal bureau system as soon as possible. Half an hour later, all of these people took their most trusted subordinates to Li Mu's office to discuss the case.

The criminal investigation experts of the municipal bureau proposed several parallel plans. One was to immediately find the first scene of the crime, find clues from the crime scene, and follow the clues; the other was to use mobile phone location to find Song Zhilei's whereabouts.

The municipal bureau urgently assembled a team of criminal police officers and began to investigate and investigate the place where Wei Lan last left in plain clothes, that is, 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 operators to cooperate in retrieving relevant information about all mobile phone numbers. Gu Jianghe attaches great importance to this matter. He called the head of Yanjing of the two major operators in the middle of the night and asked to immediately send senior technicians to Taobao.com to cooperate with the public security to solve the case.

At around 1 a.m., Taobao's sales had just exceeded 300 million yuan. The head of Yanjing, the two major operators, rushed to Taobao with several nervous operator technicians, computers and other equipment. As soon as they arrived, they immediately expressed their opinion to Gu Jianghe that they would do their best to help the municipal bureau solve the case.

Gu Jianghe immediately issued the first order: to locate Weilan's mobile phone location.

After operating in the backend system for a while, the engineer and technician of the mobile operator said with a sorry look: "The other party's mobile phone is no longer online, 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 judge the approximate position of the mobile phone through the signal difference between the multiple base stations and the mobile phone. For example, one thousand meters away from point a, one thousand five hundred meters away from point b, and one thousand eight hundred meters away from point c, and draw a circle with the distance between the three base stations as the radius. The area where the three circles overlap is the approximate position of the mobile phone. This positioning method is not accurate enough, and the error is about one or two hundred meters."

Li Mu said: "Then look at the base station records of Weilan's mobile phone when it was last connected to the Internet, 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 when users enter the network, so there is no specific base station record in our backend, only the user's access time."

Li Mu was very surprised: "There is no record? Don't your base station record the equipment information on the network by default?"

The technician said awkwardly: "To be honest, Mr. Li, you are not much different from ours in the background processing when you are doing the Internet. You know, a device is in the city. With his daily life trajectory, he has to switch base stations frequently dozens of times a day, or even more. If every time you access the base station and the base station needs to record it, the amount of data writing is too huge, and it is difficult for our database to support it like this..."

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

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

"Roaming..." The technician's face was even more embarrassing, saying: "The reason why the user switches base stations in the local range does not record, on the one hand, the data write volume is too large, and on the other hand, it is also due to cost considerations. However, once the user arrives in a different place, the call will incur roaming fees. Therefore, in the roaming state, the base station will record his relevant information to collect the user's roaming fee..."

Chen Ze suddenly exploded: "Fuck! Your operators are also cheating! If local users do not incur roaming fees, you will not record them. If you incur roaming fees, you will not record them at once?"

"this……"

The technicians' faces were red, and the actual situation was indeed the case. The company also serves profits and does not want to blindly store large amounts of records that cannot generate profits to increase additional costs and burdens.

Li Mu expressed his understanding in his heart that mobile operators have hundreds of millions of users across the country. If every user switches the base station back and forth every day, the information about the base station must be recorded and written to the database, the amount of data generated every day will be so huge that it is scary. Without the driver of profit, the operators will naturally not invest so much to retain this meaningless data. Moreover, the larger the amount of data written, the greater the impact and test on system stability. Therefore, 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 for now. Let me ask you, since the last time you entered the Internet, there was no base station record here, that means that Wei Lan's mobile phone was still within the jurisdiction of Yanjing City, right?"

The technician nodded: "It was the case when I joined the network last time, but now the phone is turned off, so I can't guarantee whether it is still in the city."

Li Mu asked again: "If the other party's mobile phone is turned on and they are connected to the Internet 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 almost exploded: "It will take two minutes? Why?"

The technician had no choice but to explain: "As soon as we entered the network, we could get the information of the base station that was connected by default. The positioning method mentioned just now is that at least three base stations are needed to connect to the mobile phone for three-point positioning. If only one base station is determined, if it is an urban area, it may only be able to locate a range of one radius of one kilometer. If it is a suburb, it may locate a range of two kilometers or even a larger range, which is too inaccurate..."

Li Mu asked him: "So it takes more than two minutes. Can you determine the information of the first base station to be connected by default and then allow at least two nearby base stations to connect to the mobile phone to determine the location?"

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

Li Mu was stunned.

Damn, I saw criminal investigation clips in movies before, and the police took time to locate the suspect. Many times, the suspect was just in time to control the suspect. When the police were about to locate him, they just hung up the phone. 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 other party's call time does not meet your needs at 12 o'clock tomorrow, you still cannot locate a specific location, right?"

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

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

Nowadays, most mobile phone numbers do not have real-name systems, but the mobile phone number that Song Zhilei often uses is four 8 leopard numbers. This number is found by looking for relationships with the mobile operator, so there is real-name authentication. The technicians from the operator immediately began to thoroughly investigate the roaming situation of the mobile phone number.

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

"Check if there are any other mobile phone numbers under Song Zhilei's name?"

"There is one that turned off five days ago!"

"Where is his family?"

"I found out that his wife was shut down five days ago!"

There were so many difficulties, Li Mu suddenly felt a little nervous and desperate again.

What should I do if I know it was Song Zhilei, but I can’t find where Song Zhilei is? Time is tight, and the longer it delays, the more dangerous it will be.

The criminal investigation team of the municipal bureau has started to conduct a casual outfit starting from Wanying Real Estate and start surveying. At present, Li Mu only has two reliances:

First, the criminal investigation team will find the first scene as soon as possible and follow the clues to find valuable clues;

Second, at twelve o'clock tomorrow, when the kidnapper calls to confirm, he asked the operator's technician to locate the base station, hoping to locate the other party's location!

...
Chapter completed!