Strength contrast, speed contrast, theme and character contrast.

Dynamic contrast: Dynamic contrast refers to the formation of contrast in music through changes in strength, weakness, and lightness. Dynamics is an important means of expressing emotions and shaping images in music.

Speed ??contrast: Speed ??contrast is an important means of expressing rhythm and emotion in music. Tempo contrast refers to the contrast in music through changes in speed and speed.

Theme and character contrast: Theme and character contrast refers to the contrast in music through the changes of different themes and characters. For example, the song starts with a soft and beautiful theme, and then gradually introduces a dynamic theme, forming a contrast between the theme and character, making the music more layered and rich.