Hearing Fu Liangtao's short sigh, Pang Jitong immediately put his curiosity about Fu Liangtao behind him, and couldn't help but ask suspiciously, "However, in the tracking operation in the past two weeks, haven't we found nothing?"

Fu Liangtao looked at Pang Jitong's surprised appearance, couldn't help but smile, and asked, "Who said that?"

Hearing Fu Liangtao's words, Pang Jitong immediately came to his senses and asked, "Isn't it? Then why did you stop stalking?"

"Because I've identified what I want to be sure of, and I already have an understanding of Xu Jingjia's life pattern." Fu Liangtao seems to be confident when he says this, and it doesn't seem like a lie.

After that, Fu Liangtao put the tablet in front of Pang Jitong, opened a folder, examined the files in the form of a list of detailed information, and said, "These are the files about Xu Jingjia that Luo Mengning recovered from Zhou Muqing's mobile phone backup file last time."

Pang Jitong's eyes did not take off the screen of the tablet, and he thought, "Yes, I have also seen these files. In addition to the two audio files that Luo Mengning specifically mentioned last time, I have also carefully studied the other files. Most of these archives are image archives, almost all of which are photographs of Xu Jingjia.

I don't think there's any special message in it, could it be that I'm using the wrong method?"

"If you separate these files one by one and study them, you won't be able to see anything." Fu Liangtao said.

"You mean, you want to look at them together?" Pang Jitong asked inexplicably, as if he didn't quite understand what Fu Liangtao said.

"That's right, it's about studying them together." Fu explained, "Most of these files are very fragmented and meaningless when viewed individually, but if you sort them by the date they were created as they are now, can you see if you can see what can be seen from them?"

Fu Liangtao took advantage of this gap to mark the title of the book "Electronic Data Evidence and Computer Crime" in Xu Jingjia's borrowing and returning records, took a photo with his mobile phone, and sent it to Brother Cong along with screenshots of several pages of the book.

Pang Jitong's fingers slid across the screen of the tablet and said with a slight solemnity: "These files were found in Zhou Muqing's mobile phone backup, and between March and June 2019, there were nearly 300 images and audio files related to Xu Jingjia in just over three months."

If it's between friends who come and go, this amount is really nothing. However, Fu Liangtao and Pang Jitong both knew that Zhou Muqing and Xu Jingjia had not been in touch for a long time during this time.

"That way, you can see that something is wrong, right?" Fu Liangtao's tone was full of confirmation, he looked at Pang Jitong and nodded, and then continued: "According to our investigation so far, Xu Jingjia rarely goes out except on Wednesdays, Saturdays and Sundays. Judging from Hui Ching-jia's billing records, she has maintained such a lifestyle since the beginning of 2018."

Fu Liangtao stopped when he said this, waiting for Pang Jitong to digest what he had just said.

Pang Jitong followed Fu Liangtao's thinking and said, "And when going out unplanned, Xu Jingjia basically doesn't bring a mobile phone...... Fu Liangtao's words Pang Jitong frowned and meditated for a while, and did not speak again.

After a long time, Pang Jitong took out his mobile phone, opened the calendar app in it, and carefully compared the date of creation of the file.

When Fu Liangtao completed this series of actions, he just heard Pang Jitong say, "These images ......"

"What's wrong? Did you find something?" Fu Liangtao then leaned in and asked.

"Most of these image files are created on Wednesdays, Saturdays and Sundays, with two to five image files created on a single date. The date of creation of audio files is not as regular as that of image files, and generally there is only one audio file established on a single date." With this discovery, Pang Jitong's brows became tighter and tighter.

Pang Jitong also changed the mode of inspection to a pictorial view, and a large amount of text on the screen with the name of the file was instantly transformed into frame after frame of Xu Jingjia's photo.

"The background of these photographs ......" Pang Jitong recognized the background of these photographs, because Pang Jitong had been to the place where these photographs were taken several times during the past two weeks. A few of the photos were taken inside the MTR car, while most of the rest were taken against the backdrop of Sham Shui Po. Combined with the date and time of the establishment of the archives, the people of time and place recorded in these image archives coincide with the time and route of Xu Jingjia's regular visits to the meetings.

As for the few remaining photos, Pang Jitong only vaguely recognized that the background was a busy street, shopping mall or vegetable market, but it was a place that Xu Jingjia had not visited in the past two weeks. The date of creation of these few photographs is irregular, and the locations taken are rarely repeated.

"Sir Tao, could it be that Zhou Muqing asked someone to investigate Xu Jingjia before he died?" Pang Jitong raised his eyes and looked at Fu Liangtao and asked, wanting to confirm his guess through Fu Liangtao.

If it weren't for Fu Liangtao's reminder, Pang Jitong really didn't consider the relationship between these archives at all, and simply thought that these files were all files obtained by Zhou Muqing from a certain social media. However, after Fu Liangtao's reminder, Pang Jitong thought of comparing these files with the records of tracking actions.

In contrast, Pang Jitong felt that these records, which were composed of a combination of image files and audio files, were not only taken from a remarkable angle, but also were not inferior to their track records over the past two weeks, or even more detailed than their records.

For Xu Jingjia, who rarely goes out, and even when she does, she rarely stays on the street, these more than 200 images and audio files record her life in great detail.

This record is clearly the work of a professional.

"So it seems." Fu Liangtao replied.

"Could it be that Zhou Muqing was already suspicious of Xu Jingjia a year ago, so he thought of finding someone to investigate Xu Jingjia?" Pang Jitong said to himself, speculating based on this discovery in his heart. "However, if Zhou Muqing finds someone to investigate Xu Jingjia...... Why did we find several identical image files and audio files in the files we salvaged in Li Bingde's laptop?"

Just thinking about it, Pang Jitong raised his eyes and saw that the sky was getting dark, but Fu Liangtao still had no intention of leaving, so he couldn't help asking, "By the way, Sir Tao, it's so late now, what are we waiting for here?"

The corners of Fu Liangtao's lips hooked, and he replied, "Let's go! We're going to meet Brother Cong and Ah Ning now."