Pop music is also called popular music, a music variety between folk music and art music. Its characteristics are that pop music is mainly produced in cities, created by professional musicians, and is generally transmitted orally. Popular music is mostly based on daily real life. Most of the vocal works are love songs, while most of the instrumental works are dance music and arrangements. Because they are aimed at the general public, even works with more serious or tragic content are often stated in a lighter style, and the expression techniques and artistic styles are free and full of changes. Generally speaking, jazz music, country music, rock music, disco, break dance, etc. all belong to the category of pop music.