A policeman became a prisoner because of his mistake. He felt guilty and wanted to pay back. In my opinion, this dramatic theme figure is like a person who walks on the Mobius ring. Guilty, innocence, guilt, innocence, he tried to contain his wounds through forced repeated debates. I want to express the ignorance of human nature, just like the armadillo. Although it looks cute and not aggressive, it carries the most dangerous virus to human beings. All the characters in the play are mysterious. Everyone makes a wrong choice at a critical moment, and this kind of ignorance not only hurts himself, but also hurts others. It occurred to me that in the field of psychoanalysis, faces that people do not know themselves are always revealed through the crack of “slip of the tongue”