In the monitoring room of Qingtan apartment, there is a monitoring display screen on the east wall, from which you can clearly see the people coming and going in the apartment passage and elevator, but the safety exit staircase is not monitored.

Gu Yunfei was lying on the wooden table in the corner and sleeping, and Officer Wu sat weakly against the wall as if he was asleep, and looked tiredly at Luo Fei sitting in front of the monitor screen in high spirits to watch the surveillance video.

Luo Fei is not a policeman, the property management office let him, an outsider, see, just because Gu Yunfei is a policeman, she spoke, and the property management office let him go.

Luo Fei doesn't care if Gu Yunfei sleeps or not, as long as her privileges as an official police officer can help him in the process of investigating the case, when it comes to the privacy of the parties, her privileges can help him give him the green light and let him go to investigate.

After watching the surveillance, Luo Fei turned around and screamed at Gu Yunfei, waking her up from her dream.

Gu Yunfei said sleepily: "Detective Luo, are there any major discoveries?" ”

"Thank you for calling me Detective, I like that title," Luo Fei said, "There are no major discoveries, there are a lot of small discoveries, and they can be regarded as a lot of gains." Originally, you police had to do this job, and I didn't want you two to be sleepy on the side. ”

Gu Yunfei came to his senses completely, got up and leaned against the table, pouted and said, "We want to watch the surveillance video, it is you who domineeringly and strongly ask us to stay aside and not disturb your thinking next to you." ”

Officer Wu nodded in agreement...... A look of being wronged.

Luo Fei said: "I'm worried that you are careless and can't see the crux of the problem." ”

Gu Yunfei got up, stood behind Luo Fei, and urged, "Quick, tell me what you found." ”

Officer Wu came over to listen together.

Luo Fei said incredulously: "I watched the surveillance video of the Qingtan apartment for two years, Yang Biao moved into the Qingtan apartment for a year and three months, he rarely went out, except for the courier and the delivery person knocked on his door, no one else came to his house." ”

Officer Wu exclaimed: "-What a hardcore otaku." ”

Gu Yunfei said: "I care more about whether Yang Biao and Kuang Na know each other?" ”

Luo Fei said: "I really want to see Kuanna knock on the door of Yang Biao's house, or Yang Biao knock on the door of Kuanna's house, but never, Yang Biao, who stays at home, has never been to the 22nd floor, and Kuanna has never been to the 11th floor." Moreover, she spends most of her time at home and rarely goes out, and except for a man who is a little older who visits her often, few relatives and friends visit his residence. But she is a little better than Yang Biao, and she basically goes out every day to breathe. ”

Gu Yunfei said: "So it proves that Kuanna and Yang Biao don't know each other at all, and it should be her boyfriend Mingshu who often goes to Kuanna's residence." ”

Luo Fei called up a surveillance video in the elevator, pointed to the picture and said, "Look, this is the 12th of last month, Guo Na and Yang Biao entered the elevator from the first floor at the same time, and there were just the two of them in the elevator. Yang Biao went out on the 11th floor, but Guan Na still didn't look up, just looked at her phone, and they didn't communicate from the beginning. If they know each other, they will greet each other or smile, and you can see their indifference to each other as if they were two strangers in the same elevator. ”

Gu Yunfei said: "What we can be sure of now is that although Yang Biao and Kuang Na live in the same building, they don't know each other, even if they meet occasionally, knowing that the other party lives in the same building, they won't greet each other because they are unfamiliar." ”