"How to treat it?"
Gu Shengyin glanced at Second Young Master Zhou: "If you were looking for someone else, it would indeed be quite troublesome."
The middle-aged man's eyes brightened upon hearing this.
What Miss Jiang meant by saying this was: if they found her, then it wouldn't be troublesome?
Sure enough, the next moment Gu Shengyin spoke: "However, since it's me you've found, this matter is easily handled."
The middle-aged man looked at Gu Shengyin with joy: "Please go ahead, Miss Jiang."
Gu Shengyin looked somewhat disdainfully at Second Young Master Zhou who was lazily leaning against the door frame: "Have him stay by my side for a month."
This current state of Second Young Master Zhou is a typical case of Yin Evil possessing the body, and it's extremely sinister Yin Evil.
With ordinary methods, one would need to find many Yang-attributed Medicinal Materials, accompany it with a strongly Yang feng shui arrangement to dispel it, and it would take quite some time.
