Wedges were usually used in novels, movies, TV series, and other literary works to insert some short plot, introduction, background, and other elements before the main text. They were usually short texts or independent texts that could guide the reader. In novels, TV series, and other literary works, the key points were often used to introduce the protagonist, background, and story outline. At the same time, they could also be used as important plot points to promote the development of the story. The content of the wedge could be a part of the story or the introduction of the whole story. It could be a dialogue, a description, or a description of a scene. Wedge is a literary form that usually appears in traditional novels, operas, and other artistic forms, but it is also widely used in modern literature.