When this episode appears, it will be the focus of this TV. I mean, there is basically little dialogue at this time, mainly because the music develops with the plot and the episode changes with the picture. Background music is the foil of the film, that is, people are often still talking, and music appears when the plot is urgent, and the general sound is weaker than the main sound. Theme songs often appear in the form of interludes and background music, which can mainly express the meaning of film and television, reflect the development and changes of the plot, etc., appear in the play, set off the psychology or action of the characters, render the atmosphere and infect the audience.