In a novel," unable to see one's own shadow " usually meant that the protagonist had lost his own shadow under certain circumstances or that his shadow had disappeared. This kind of plot often appeared in fantasy, science fiction, or horror novels to describe a mysterious or strange atmosphere. In the literary sense," not seeing one's own shadow " often implied that the protagonist's mind or thoughts had changed or suffered a huge blow or trauma, causing him or her to lose their sense of self-identity and sense of belonging. Under such circumstances, the protagonist would often fall into a state of confusion, loneliness, and helplessness, unable to find a way out. In specific storylines,"not seeing your own shadow" was often used to shape the protagonist's special personality and psychological state so that readers could better understand and empathize with him. For example, a protagonist without a shadow might become unusually independent, strong, or fragile. A character without a shadow might become more mysterious, strange, or ordinary. These changes helped to dig deeper into the protagonist's inner world and emotional state to enhance the novel's legibility and appeal.