What is the hollow lens in film and television art?

Empty shot: A shot in which no people or animals appear in the picture, also called a scene shot. Through mobile photography and montage editing, empty shots and shot groups with characters appear can connect multiple meanings, such as expressing thoughts and feelings, explaining the time and place where the story takes place, transforming time and space, and controlling the rhythm of the narrative. It is mostly used to express emotions and create artistic conception, and has artistic effects of metaphor, association, and sublimation.