Before he finished speaking, Pang Jitong saw Fu Liangtao looking at him for a long time, so he smiled a little embarrassedly and stopped talking. Pang Jitong said this because he believed that the rumor about plastic surgery had pointed to the identity of the prisoner to the woman. In this way, they can eliminate irrelevant rumours and reduce the workload of the investigation.

"Don't you think such an analysis is too rough and sloppy?" Fu Liangtao asked. Without waiting for Pang Jitong to answer, Fu Liangtao took out a laptop from under the table and said, "The electronic files we used to use from Li Erren, Xu Ningzhi and others can come in handy now."

Fu Liangtao put the laptop in front of Pang Jitong and said, "Let's divide up and work together to listen to all the electronic files from September 2010 to June 2012 one by one!"

Pang Jitong thought that the prisoner was monitoring Xu Jingjia through his mobile phone, and he thought that the work was huge. didn't admit it, but it was a little different from what he thought.

At the end of 2010, after the first audio file appeared, another audio file often appeared every three to four weeks, but there were more image files.

It was not until November 2011 that the number of audio files began to rise in a straight line, and in April 2012, it climbed to a high front.

Fu Liangtao speculated that the increase in the number of these electronic files, in addition to proving that the prisoner's actions have intensified over time, should also be related to Xu Jingjia's living habits.

The recorded audio file is a fragment of Xu Jingjia's elegant interpretation of Su Shi's poems. Li Bingde received the time in 2014, while Xu Ningzhi and others received the same time at the end of 2010.

It was because of this audio file that Fu Liangtao speculated earlier that the prisoner was someone Xu Jingjia was familiar with. This was because at the end of 2010, smartphones were not yet fully ubiquitous in Hong Kong, and the number of electronic files showed that the prisoners could only conduct limited surveillance of Hui Ching-ka at that time. This limitation may be due to the fact that Xu Jingjia was not using a smartphone at the time.

In this way, Xu Jingjia, who uses an old-fashioned mobile phone, cannot transmit voice messages to the other party, and from the context used by Xu Jingjia, it seems that the person who recorded this audio should be the person who was talking to her face-to-face at the time.

Now, based on the information from the Student Advisory Office of the Department of Applied Mathematics of the University, they have learned that Hui Ching-ka purchased a laptop manufactured by L brand in September 2011 through the school's student laptop purchase programme. The pick-up date for the telegram was in late October 2011, coinciding with the start of the increase in the number of electronic files.

Fu Liangtao and Pang Jitong then analyzed the specific rumors that the prisoners wanted to spread at a certain point in time through the time when Li Erren, Xu Ningzhi and others received the electronic files, as well as the content of the files.

In the process, they discovered an interesting feature, that the prisoners had tried to create far more rumors than they had discovered during their associate's degree. The prisoner adjusted the content of his rumors over time, and the themes of the rumors gradually became more concentrated, and the methods that did not have much effect were gradually eliminated by the prisoners, and finally the themes of "money worship", "impure motives", "utilitarians", "casual in emotional matters", "liking to watch unspeakable content" and "exculpation" remained.

These are also the marks of Xu Jingjia in the eyes of Xu Ningzhi, Liu Zijun, Cheng Qiao, as well as Fu Liangtao and Pang Jitong, who visited recently.

With the exception of items B, D, G-I, almost all of the rumors were confirmed by these electronic files to be related to the prisoner. However, even though the relevant electronic files could not be found, B and G and H, which were related to plastic surgery, were unanimously agreed to be inextricably linked to the cyber harassment incident.

The contents of the electronic dossier make these rumors extremely true. Through the earliest appearance of various electronic files, Fu Liangtao gradually felt that although these rumors did not match the results of his psychological observations, they were impossible to question.

No matter how time passes, the authenticity of the content does not change over time.

Fu Liangtao could feel that in the process of analyzing these electronic files, Pang Jitong gradually recognized these marks given to Xu Jingjia by the prisoners. Earlier, the results of psychological analysis have been regarded as nothing by Pang Jitong.

So, what about Fu Liangtao himself?