"Ghost upper body" is a kind of folklore that refers to the phenomenon that a person's body is occupied by some kind of ghost, which leads to abnormal behavior and thoughts, and even mental disorders. Although this claim seems unfounded in modern science, it still exists in some traditional cultures and beliefs.
First of all, from a scientific point of view, there is no such thing as a "ghost body". There are no organs or substances inside the human body that allow ghosts to enter and control the human body. Abnormal behaviors and thoughts of the human body and brain can be caused by physical or psychological problems that can be treated by medical and psychological methods.
Secondly, from a religious point of view, there is a "ghost body". In some religious beliefs, ghosts are believed to exist and that they can enter the human body and influence the person's behavior and thoughts. For example, Buddhism's "demonic barriers" and Christianity's "demonic possession" both believe that ghosts can enter the human body, and these beliefs also provide corresponding solutions for people.
Finally, from a cultural point of view, the "ghost body" is a traditional cultural phenomenon. In traditional Chinese culture, the belief in ghosts and gods is very common, and people believe that ghosts can enter the human body, causing abnormal behavior and thoughts. This saying has been widely passed down in Chinese culture and has become a kind of folklore that has been passed down to this day. Although modern society has become more and more scientific, folklore still has its inheritance and existence value.
To sum up, the theory of "ghost upper body" is not scientifically proven, but it still exists religiously and culturally. Regardless of the perspective, the "ghost body" is a very interesting and worthwhile cultural phenomenon. For the elderly, they may have learned this from their experience and heritage, and we should respect their beliefs and cultural traditions. At the same time, for young people, we should pay attention to scientific and rational thinking, and constantly deepen our knowledge and understanding of the world.