When he arrived downstairs in Gao Yiming's company, Cheng Yu was also > by Wu Jing to park the car, Cheng Yu took a look, and Wu Jing received Li Dali's last QQ message on September 16, four years ago.

This almost meant that Mr. Li left China within days of that.

At this point, Cheng Yu called Lao Bian again and asked him about the specific time of Li Dali's ticket to leave China.

September 18.

This can be completely confirmed that Li Dali left a message for Wu Jing in China, but Wu Jing told Cheng Yu that he rarely opens QQ, so when he saw Li Dali's message, several days had passed.

Cheng Yu figured out that Li Dali might have wanted to talk to Wu Jing at that time, and maybe he would ask him to meet him and have a meal to say goodbye or something.

However, due to Wu Jing's failure to reply in time, Li Dali was so alone.

From the normal behavior pattern, it is speculated that the time when Li Dali left a message for Wu Jing should be when he just contacted the other party, and the other party promised to build a research and development team for him so that he could give full play to his strengths.

The other party should have asked Li Dali for his ID number, passport number, etc., and went directly to help him apply for a visa and other matters, and then the first time he applied for a visa, he was rejected, but the other party had great powers and immediately got a labor certificate from Chile. With the guarantee of the other company, Li Dali's visa will not be a problem.

Cheng Yu estimated that maybe Li Dali didn't expect it to be so fast, after all, according to the normal procedure, it would take four or five working days just to apply for a visa. At that time, Li Dali may have felt that he had at least more than a week to prepare, but he didn't expect that only two days later, the other party informed him to go directly to the magic capital, and then left China by plane.

This is probably the reason why Li Dali left a message for Wu Jing, but did not call him and invite him to come out to say goodbye.

A person who thinks that he has at least a week or more to go will definitely not be in a hurry to say goodbye to his friends for a while, he should just want to share the good news to Wu Jing that someone is willing to invest in building a research and development team for him.

But time was in a hurry, and on the third day, he was already sitting on the plane to Santiago, Chile, which led to the fact that he and Wu Jing were unable to have a simple communication on this matter.

went upstairs, and the little girl at the front desk already knew Cheng Yu and led him directly to Gao Yiming's office.

"Young master, what do you want me to do for you?"

"Get a technician, preferably someone who is well-versed in IP tracking. ”

Gao Yiming was stunned for a moment, and hurriedly said, "Young Master, what do we still need to use hackers?"

"It's not as mysterious as you think, it's that there is an engineer in the research institute, and ......it's been four years since he lost news," Cheng Yu simply recounted Li Dali's situation to Gao Yiming.

Gao Yiming touched his chin and said: "This is really quite strange, the key is, no matter what the other party wants Li Dali to do, why should he cut off his contact with the outside world? Could it be that he wants to leak the military secrets that he participated in research and development before?"

"You ask me, I ask who is going? Hurry up, find a technician. ”

Gao Yiming picked up the phone on the table, gave an order, and asked a person named Xiao Nie to come over.

After a while, the door was pushed open, and a young man who looked a little honest, or more bluntly, a little bit of a middle-of-the-second in appearance, walked in.

"Mr. Gao, are you looking for me?" As he spoke, Xiao Nie also pushed the heavy black-rimmed glasses on his face.

Cheng Yu looked at him.

A red and gray plaid shirt on the upper body, earthy yellow slacks with washed cloth on the lower body, and a pair of black leather shoes with a very old style, no matter how you look at it, it is the standard image of a programmer.

"There's something I want you to help ......" As he spoke, Gao Yiming asked Cheng Yu to take the business card and gave Xiao Nie the address on the back of the business card, "The background address of this website, as well as the login name and password, you go up and see how many different IP addresses there are." ”

Xiao Nie didn't ask much, took the business card, sat in Gao Yiming's seat without giving up, and then directly entered the address of the website background on the computer's browser.

Ten fingers flew like flying, and quickly verified the password and entered the background of the website.

After a very simple operation, Xiao Nie called up all the IP addresses that had visited this website.

"The IPs are all here, what do you want me to check?"

Cheng Yu said: "Let's make a distinction between these IP addresses to see if there are any from non-Wudong regions, and it is best to directly find the IP addresses from foreign regions." ”

Xiao Nie: "Oh. He continued to fly with his fingers, and said in fragments: "This requires a simple program to conduct a large-scale selection, there are not many IP addresses, but there are tens of thousands, covering almost five years......"

It didn't take long for Xiao Nie to finish writing the applet, and after typing enter, the program started to run.

Soon, those IP addresses went through a preliminary selection, and Wu Dong's local login IP was all deleted.

"That's it, there are almost more than 2,000 non-Wudong areas. ”

"There are so many?" Cheng Yu was a little surprised.

Xiao Nie said: "Although the number of visits to this website is very limited, netizens always come from all directions, and the number of entries can be reduced from tens of thousands to more than 2,000, which is very few, which can only show that this website is private enough, and basically only locals in Wudong will know about it." Which store's official website is this? No, even if it's a small store's official website, only tens of thousands of people have visited it in five years, which is too inefficient. This store should have closed a long time ago!"

"The address of this website is only known to two people. ”

"Huh?" Xiao Nie was stunned, then lifted the black-framed frame on his face again, and muttered: "That's a bit diligent in visiting, tens of thousands of visits in five years, a total of only more than a thousand days, and dozens of visits every day." Hey, no, almost half of these IP addresses were accessed four years ago, and less than 40% of them were in the last four years. 30,000 a year, more than 100 times a day......"

Cheng Yu said in his heart that this is consistent with what Chen Huan said, and he said: "Are you talking about the total number, or is it the time left in the more than 2,000 pieces?"

Xiao Nie said: "It's almost the same, the total is more than 60% concentrated in the first year, and after the selection, more than 60% is concentrated in the first year......

Cheng Yu was slightly stunned, and then said: "That means that these IP addresses include background logins." ”

"That's for sure, the backend and the frontend are actually a system, which is a second-level page grafted on the website of a webspace provider, and the backend is a third-level page, whether it is visited in the frontend or backend, it will be recorded under the entire second-level URL. ”

"Can you tell which ones are logged in the background and which ones are logged in in the foreground?"

"It's simple. Xiao Nie said as he moved his fingers like flying, his fingers were almost about to form a phantom, Cheng Yu was speechless while looking at it, and said in his heart that this is really the hand speed that has been single for more than 20 years.

That is, in the minutes of time, Xiao Nie distinguished all the IP addresses, he said: "There are more than 45,000 IPs in the front desk, and there are only more than 4,000 in the background. Hey, interesting, of the more than 40,000 interviews at the front desk, less than 8,000 are from within four years, and more than 80% are from the first year. The more than 4,000 in the background are more average, but in the last two years, accounting for more than 50 percent, and only about 40 percent in the first three years. ”

Cheng Yu pondered it briefly and understood.

Background access is Chen Huan's masterpiece.

She basically visits the background at a fixed time and a fixed number of times every day, the purpose is to upload photos and videos of her children, the number of times may be different every day, but in years, it will be more or less average.

The reason why it has been high in the past two years should be that Chen Huan found that these photos and videos have not been visited at all, which means that Li Dali has not been on this website again, so she has increased the number of visits to the background to see when Li Dali will come back to take a look.

This is also the reason why Li Dali's relatives asked her about Li Dali's whereabouts and contact information, although Chen Huan reported the case at that time and did not follow up after that, but it was impossible to completely ignore it.

In the last two years, the number of visits has been higher than in the previous three years.

"Among the access IPs at the front desk, are there any after September 18 four years ago?"

When Xiao Nie heard Cheng Yu's words, he immediately pulled the slider on the right, pulled it to the end, and glanced at it.

"Hey, there are only more than fifty ......" Xiao Nie checked them one by one, and quickly said: "More than fifty are visited in two days, more than forty on the first day, and only eight on the second day...... They are September 20 and September 21. There was no record of the visit on September 19th......"

Cheng Yu nodded, and said in his heart that after Li Dali went abroad, he still paid a visit.

The reason why there is no record of the visit on September 19 is that he did not have the time or opportunity to visit this website at that time on the plane and on the way to various transfers.

And on the 20th and 21st, he should have arrived at the Falklands, and got a computer and the Internet, so he browsed the website.

Xiao Nie was still browsing through the more than fifty access records, and said in fragments: "There are upload records in the background on the 20th, a total of eight files, each file ......

Hey, there are only 21 access records in total. I'll take a look at ......

Oh, the nineteenth, there are seven files uploaded in the background, and the access to these seven files also happened on the twentyth. There are twenty-three in total. That's right, all the forty-four access records on the 20th have been found. 21st ......

Strangely, a total of nine files were uploaded on the 21st, but there were only eight access records......

Well, the last file that was uploaded, was not accessed. ”

Every time Cheng Yu wanted to interject, he was interrupted by Xiao Nie, who seemed to have entered a realm of complete selflessness, only himself in his world, completely ignoring Cheng Yu's existence.

"This doesn't fit this visitor's access habits, let me see, the nine files on the 21st were uploaded almost at the same time, why did he only access eight of them, and only one access......?

Xiao Nie looked forward, and continued to chatter: "The more you upload the file, the greater the number of visits, well, but the visits on the same day are basically about two or three times, and the time is quite fixed, between nine and ten o'clock in the evening."

This is even more strange, for more than a year, I will visit this site every day, most of the time on the day of the visit to the files uploaded, but as the number of files uploaded in the past has increased, I have begun to selectively return visits, and by September, the number of visits per day has reached almost 2,000 ......"

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