For example, the time she set up Yun Rou so that she would suffer the consequences of her own actions almost drained her evil energy. She was so scared that she pulled a random middle-aged woman along the way and wanted to help her catch ghosts.
As for those little ghosts, if they weren't allowed to do bad things, then she could only use her evil energy to feed them. There was no other way.
It was obvious that the more evil energy she had the better. She didn't know when she would need to use it. If she used up her evil energy, then she would be dead and that would be pure injustice.
Just as Yun Qin was reflecting on how unprofessional her method to solicit clients was and how it did not tempt the woman that she met yesterday, she walked out of the neighborhood and saw that same middle-aged woman who might have ghosts in her house.
