Zhuge Liuyun's surveillance of Yan Fei's comings and goings in the Quadrangle Courtyard had actually been detected long ago by the Artificial Intelligence "Dream." The reason why this surveillance team was exposed was that they used the latest surveillance equipment, which had to be connected to the internet to function, and the moment they went online, they were discovered by "Dream."
Because of "Dream," Yan Fei had known for several days that he was under surveillance and had traced back to find out who was monitoring him. So, to avoid exposure and to use this surveillance team as an alibi, he put a lot of thought into finding another route, launching a surprise attack from underground to kill Yang Liu.
