Why did Lu Qing lie on the rails?

Drunk and unconscious. Fang Yuan took Lu Qing out of the cinema and went to the station to find the monitor and watch the video replay of Lu Qing standing drunk outside the track a few days ago and attempting to commit suicide by jumping off the track. Lu Qing was drunk and unconscious at the time. Fang Yuan scolded Lu Qing for treating life as a child's play. Several surveillance personnel thought Lu Qing and Fang Yuan were lovers and reminded Fang Yuan to cherish Lu Qing. Lu Qing had actually had thoughts of committing suicide for a long time. This was not the first time she committed suicide by jumping off the rails. After regaining her life, she was depressed and accompanied Fang Yuan to dinner with Tao Jun and Lin Li.