Lian Jingrong's task will naturally not be completed so easily.

Not long after Xu Jingjia entered the covered playground with his front foot, Fu Liangtao let Lian Jingrong naturally follow him with his back foot. Lian Jingrong pretended to walk around the playground casually, while letting Fu Liangtao observe Xu Jingjia's movements with others up close.

At this time, Xu Jingjia's work should have begun for a while, and when Lian Jingrong paced to the third classroom in the covered playground, Fu Liangtao saw Xu Jingjia laughing with her students through the screen.

According to her observations over the past period of time, Xu Jingjia seems to soften her attitude only when she is facing children.

The volunteer teaching work is carried out on a one-to-one basis, and in addition to Xu Jingjia's group, there are also six or seven groups of students in the classroom making up the class. Lian Jingrong did not approach the classroom, but only watched from a distance.

Then, after the volunteer work was over, Xu Jingjia suddenly left the classroom in a hurry, quickly passed through the round arch, stopped a taxi directly in front of the door and jumped on.

It all happened quite suddenly, without warning.

Fu Liangtao noticed that something was unusual, so he immediately drove up from behind, and explained to Lian Jingrong and said, "You have to find a way to understand the situation, I'll go with Xu Jingjia to see where Xu Jingjia is going."

When the scenery on the road gradually became familiar, Fu Liangtao guessed that Xu Jingjia originally wanted to go home. I saw that after Xu Jingjia got off the taxi, she bowed slightly and walked, and her pace was obviously much slower than before she jumped into the taxi.

This discovery killed Fu Liangtao's original expectations.

Fu Liangtao looked at Xu Jingjia's figure from a distance, his eyes narrowed.

Fu Liangtao recognized that he was in a rather passive state. This is a common difficulty in investigating cybercrime, as there is often a gap between the time of the crime and the time of revelation, which gives the offender enough time to destroy the fragile and volatile evidence.

However, it was the first time that Fu Liangtao encountered a suspect who had built a thick wall for himself. She was hiding in it, and all the cover seemed to be unbreakable.

After the past Wednesdays and Saturdays, Fu Liangtao found that the chances of approaching Xu Jingjia alone and finding flaws and breakthroughs from her were quite slim. Xu Jingjia was too wary of others, and Fu Liangtao originally estimated that the female investigators would lower her guard. However, judging from the results of the investigation in the past three days, Fu Liangtao found that this was not the case.

In order to increase the efficiency of the investigation, Fu Liangtao decided to add a more primitive method without thinking about it. After Fu Liangtao waited for Xu Jingjia's figure to disappear completely, he parked the car and took out the network monitoring tools that had been prepared from the car.

Using a network listening tool can give you more detailed results than investigating the billing records of an ISP. Because the supplier's billing records may still be disguised by the user's cunning, but the network listening tool is directly integrated with the user's network, and all data must pass through this tool when entering and exiting, so the network monitoring tool can capture the data transmitted in the network, accurately capture the data packets in and out of the network, and conduct real-time network monitoring for users.

And this primitive method has another advantage, that is, no matter how good Xu Jingjia's skills are, it is difficult to detect.

In this way, even if Xu Jingjia really has other hidden devices, as long as she uses them again, Fu Liangtao will definitely be aware of them.

Not long after, Fu Liangtao took a lift that was not commonly used by Xu Jingjia to reach the upper floor, and reached the floor where Xu Jingjia lived through the fire staircase. What Fu Liangtao didn't expect was that when he was about to install this network monitoring tool, he took a closer look, but it turned out that someone had already completed what he wanted to do before him.

Fu Liangtao's first thought was Zhou Maoxing, but the next moment, Fu Liangtao denied this hypothesis. Fu Liangtao knew very well that Zhou Maoxing's skills were not enough to deal with the tools of network surveillance, and if he had enough ability, Zhou Maoxing would not have entrusted him to conduct an investigation in the first place.

Fu Liangtao saw that the model and style of this network listening tool were no worse than the ones he used, and it seemed that the other party was also familiar with this way.

Fu Liangtao thought about it, put on gloves and installed a camera in a hidden position in the box, and half-unplugged the wiring connected to the network listening tool, but did not completely unplug it.

Fu then quickly returned to the car and shelved plans to install a network listening tool.

Fu Liangtao couldn't wait to open the laptop and set up the relevant settings, hoping to complete it before the other party came to check.

The existence of this network listening tool proves that someone is monitoring Xu Jingjia's online activities in real time. Fu Liangtao suddenly thought of Zhou Muqing's investigation of Xu Jingjia, but Zhou Muqing had been dead for more than a month, and the investigation was to collect the deposit first and then settle it.

However, the fact that the network listening tool has not yet been recycled shows that the investigation is not over.

This time, who will be investigating Xu Jingjia?

Fu Liangtao's doubts about Xu Jingjia are getting deeper and deeper, why are so many people so concerned about her dynamics?

Fu Liangtao stayed in the car and waited and waited, from almost six o'clock to nearly eight o'clock, but he did not wait for the other party to come and inspect the network listening tool. If the other party is a private detective, he should be hiding nearby, and if there is a problem with the real-time monitoring instrument, he will inevitably go to check immediately.

Is the reason why the other party does not come to check because the other party has already noticed it? So why don't you show up and avoid revealing your identity?

Fu Liangtao carefully recalled in his mind the people who had appeared next to Xu Jingjia in the past few weeks during the period of following and approaching Xu Jingjia.

Even during the two weeks of tracking Xu Jingjia, Fu Liangtao didn't seem to find any relevant personnel, or was the other party just monitoring Xu Jingjia online?

Fu Liangtao went to the management office where Xu Jingjia lived to extract the relevant CCTV records, and then drove back to the police headquarters with doubts.

After Fu Liangtao parked the car, he walked absentmindedly towards the police building, and the road was gloomy, and he didn't know if it was because of the doubts or the stuffy heat of the summer night.

Until about 11 o'clock in the evening, Fu Liangtao watched part of the CCTV content in the office, but still found nothing, so he picked up a water cup and prepared to make another cup of coffee to rest for a while, and then continued to fight.

When Fu Liangtao passed by Pang Jitong's seat, he saw a picture book on Pang Jitong's desk. The cover of the picture book is mainly black and white, and the center is painted with a real rabbit that makes Fu Liangtao repeatedly unable to take his eyes off.

Fu Liangtao forgot to make coffee all of a sudden, so he picked up the picture book.