365 Kinds of Difficult Living Methods

After stiffening for a few seconds, Muyu returned to normal and accepted the reality.

Chu Yu was still stunned, as if he hadn't slowed down, and he seemed to be thinking, staring at the screen intently.

Muyu put her hand on her shoulder, "Boss, it's okay, maybe it's like what Xiaobang said. After finding out the truth, Xiaohuahua gave a heavier sentence. If you feel like you are wrong, maybe she doesn't want others to know her. In the past."

Chu Yu put his hands on the computer desk and pointed to the screen, "No, I think I can dig deeper."

"An elderly person in his 70s?"

According to the information, the owner of the ID card is named Jiang Jianzhou, 70 years old, and lives in Weini Community, Linquan North Road.

Chu Yu nodded, although he was affirmative, but his expression was confused: "I think the elderly are also suspicious."

"Chu Chu, if she is 40 or 50 years old, it is possible, but she is 70 or 80 years old, and may not even be able to use a smart phone. The possibility of providing help to Xiao Huaihua is too small. Even if she is looking for an accomplice, why should she Can't think of it, find an old man who may not be able to read clearly?"

"So you think this Comrade Jiang Jianzhou is completely unaware of it?"

Muyu looked at the transaction records given by the bank and said, "It should be. Actually, I think the chance of finding X in this way is relatively small. Although Xiaohuahua has a bank card, a payment account, and an ID card. And phone numbers, but these are not necessarily X’s own, or she may steal other people’s information for her own use."

Chu Yu took the bank records in her hand and glanced over the time, "This card has been in place for 13 years and has been used in Wangjiang City. But it started two months ago and the transaction locations are located in two provinces and cities. , Luoyu City and Jinling City, this is also in line with Xiaohuaihua’s trajectory, and it is certain that she used it. This shows that this card was first held by Jiang Jianzhou, and then transferred to Xiaohuaihua. If it weren’t for the old man, she would take the card. Give it to her, then he may have lost the card and was picked up by Xiaohuahua, but in this case, why didn't he report the loss?"

"His card is still a magnetic stripe card, and it has not been replaced with a chip. The principle of a magnetic stripe card is like a magnetic tape. It has low technology and no key. It can be copied. Maybe the old man's card has been copied, but he didn't notice it. "

"But after copying the bank card, you still need a password?"

The corners of Muyu's mouth are slightly curled, showing the proficiency of "undebuted hackers": "There are many ways to obtain passwords, and older people generally have simple passwords, such as birthdays, consecutive numbers, and I think Xiaohuahua has the ability. Copying the other party’s bank card will definitely be able to get the password."

Chu Yu once again expressed doubts: "However, the use of the payment platform requires a mobile phone verification code. Whether it is a bank card or Alipay, it is bound to the mobile phone number of the elderly. If it is not provided by the elderly, how did she know?"

"This can be achieved. If the old man accidentally clicks on the link she sent, a Trojan horse program is installed in the phone, and the corresponding permissions are turned on, then she can know all the verification codes."

After Muyu finished speaking, he once again turned his attention to the computer page that "witnessed the miracle", "Maybe Xiao Huaihua just stared at him as an old man, knows nothing about the Internet, does not check consumption records, and is unlikely to find that his ID card is bound. Suspicious account so that she can get away with it."

Chu Yu frowned slightly, pondering her words, was silent for a while, and said to Muyu: "Call Xiao Bang and Da Tuo over."

Looking at her, Muyu knew that there was something to discuss, so he didn't say much, and immediately contacted the other two.

Song Qingyang and Fang Datuo only knew that Chu Yu had a result in the bank, but they had to be busy with each other. They didn't gather in the technical department office. At the moment, they heard the call, put down their work, and rushed over.

As soon as Song Qingyang entered the door, he inquired about the result. Muyu showed her Grandpa Jiang's information, and she muttered, "Who are we looking for? The mysterious person who texted?"

Fang Datuo sat down and shaved his hair out, "I thought about countless possibilities, men, women, children, teenagers, but I never thought about being an old man, do you suspect that he is not X?"

Muyu looked at Chu Yu and didn't speak for a while.

Chu Yu stared at the center of the desktop, eyelashes occasionally blinking, his eyes solemn, "Yes, we now have very little information about X, just a text message, if I have to make a psychological portrait of X, I think he It should be a teenager, fifteen to twenty-three years old, has a criminal history, directly or indirectly participated in a crime, but has not been arrested, is introverted, timid, not talkative, has simple interpersonal relationships, and looks innocent on the surface, but is familiar with Investigative methods, know how to avoid police chase."

The three clerks looked at her, stunned, "Just one text message, five numbers, how many do you put out?"

Chu Yu didn't answer, her eyes were a little mysterious-she had a speculation about Xiao Huaihua's four-year experience, so she inferred the characteristics of X based on her experience.

Fang Datuo: "So, can Jiang Jianzhou be ruled out?"

"Muyu discussed with me just now, guessing that he may not know it, but was stolen and used by Xiaohuahua."

Muyu: "Yes, although Xiao Huaihua used his bank card and payment account to bind his mobile phone number and ID card, these can be achieved through illegal means."

Chu Yu nodded, and then she said: "I first thought that X was the one who provided financial support for Xiaohuaihua, because her situation is different from ordinary economic fraud, and she needs a stable and reliable source of income. First, she must have a real ID card as a guarantee. First, she cannot use her own ID card, and she does not have an ID card; second, if she is stealing someone else’s ID card, if the owner of the ID card finds out, she will report Financial institutions or the Public Security Bureau responded that once discovered, her source of income would be immediately cut off, and there was a risk of being caught by police surveillance;

Third, I have thought that she might find vulnerabilities in banks and payment platforms, but payment platforms have extremely high security factors. The programmers are at the top level in the country. So far, there has been no incident. She wants to hack in and tamper with data. almost impossible. As soon as Xiao Huaihua acted, she committed a long-term crime, spanning several months or even longer. During this period, she had to find ways to get close to the potential victim of the attack and avoid the police from chasing after her. It was impossible to have time to worry about money, so she started from the beginning. , We must ensure that our financial sources are very stable and will never be discovered and tracked. "

Muyu understood what she meant, "So you guess that her source of income is a real person, and her ID card, payment account number, and phone number are all real. Even after checking, there is no problem?"

Chu Yu nodded, "Combined with that text message, I suspect that the source of income is X."

"But now the source of income proves to be an old man. You just speculated on X's characteristics and you are a teenager. Does it mean that we have found the wrong person? Xiao Huaihua didn't ask X to help her?"

Chu Yu narrowed his eyes. "Just now Muyu said that Xiaohuahua might have copied the old man's bank card, because the card is a magnetic stripe card. Since the chip card was issued, the bank has been urging users to change the card. Like this old man, although Now the magnetic stripe bank card can still be used, but the bank will send him a text message. Every time he goes to the bank, the teller may also advise him to change the card. If one day he updates the bank card, then Xiaohuaihua will have that card. Isn't it scrapped?"

"So you suspect that Jiang Jianzhou is also suspicious?"

"It seems that we can't get rid of the suspicion now. It is safer for us to check it personally."

The four people discussed and started to take action, but this time I felt heavy and I felt a bit of a backlash. If the old man couldn’t find anything, the Sophora japonica project might really have a sentence, but it should be an ellipsis, followed by a string. unsolved puzzle.

Fearing to attract the attention of the provincial government, they still didn't drive this time when they went out. They took a taxi to the Weini community on Linquan North Road. They went to the property office, indicating that the police investigated the case and obtained the specific unit number of Jiang Jianzhou.

Before coming, Chu Yu was already familiar with some of his information. For example, his spouse had passed away, he had a son and a daughter, both of whom were over 40, and he had his own family, and he was now living alone.

When he arrived downstairs in the unit building, Song Qingyang was waiting outside, and Chu Yu and Muyu went upstairs and knocked on the door of the room.

After a while, a question came from inside: "Who is it?"

Chu Yu showed the police officer's card, knowing that it should be visible inside: "Hello Mr. Jiang, we are the police of Wangjiang City Public Security Bureau, responsible for the investigation of an important case. I want to ask you something, can I open the door?"

The door was quiet for a few seconds, and Chu Yu was ready to speak again, but when the door opened, Jiang Jianguo stood behind the door and greeted them in.

His first impression is that he is tall, his hair is gray, but he is also well-groomed, and he is a particular old man. Chu Yu has seen photos of him when he was young, and he looked dignified and majestic. Although Fenghua is gone now and his back is a little rickety, his temperament is still retained.

After Chu Yu and Muyu took their seats, the old man made tea for the two of them, as if they were receiving guests.

The two of them sat in the middle of the sofa. Jiang Jianzhou sat to the side, not looking nervous, smiling amiably: "Hello, two police officers, what do you want to ask?"