The background and experience of Zhong.

Guo Bin is the adopted son of Liren's father, and Liren is as close as a brother. The Gao family immigrated to Canada, leaving Liren alone in Hong Kong, living alone with Liren. In addition, Liren's professional knowledge helps Guo Bin to investigate the case. Whenever a case involves mental problems, Guo Bin relies on Liren's professional analysis to solve many puzzling cases.

In Miss Wu's Murder, Guo Bin met Song En by chance. After the case, Song En returned to the police status and joined the affairs of ambassador. Guo Bin saw his own shadow in Song En and decided to cultivate her. Their feelings advanced by leaps and bounds and became lovers! However, a serial murder case has evoked memories hidden by Shengen for many years. Bloody and hatred make Shengen embark on the road of no return for bloodthirsty killers. ...