Music is a sound symbol; it can express what the people think. It is one carrier of people's thoughts. Music can make people relaxed and express people's feeling. From its history, music can be divided into five types. The first one is the blues. Blues music began in the early twentieth century in the southern part of the United States. This music has a very special type that it can use Chinese folk singing skills. The way of playing became many different types of music gradually, such as Rock and Roll, Swing, Jazz...... So the blues is the root of modern pop music. The second one is the country music. Country music came from the 1920 s American country; People use simple instruments and song to express the happy life or the sad life, the time flies or the friendship...... The tunes of country music are usually very smooth and wonderful. So the country music became the favorite music of labor in America. The third one is jazz. Jazz is an American musical art form which originated in the beginning of the 20th century in the Southern United States with the African-American. New Orleans Traditional Jazz makes many kinds of music elements together. It was a milestone in the history of jazz. The fourth one is the rock and roll. Rock and roll is a kind of music type which created in 1940 s of the United States. Well, in 1950 s rock and roll quickly became popular in the world. Rock music with its flexible and bold to express people's feelings and young people all over the world love it very much. The last one is hip-hop music.Hip-hop music, also call it rap music and now rap music development up to now is not only a black music, it quickly throughout the world, and become a kind of unique pop music symbol. Hip-Hop is street culture, the manner of a kind of life. Well, today, I want to talk about the modern pop music. Pop music is a part of popular music in music genres. Compared with rock, hip-hop music, country music and jazz, it has no regular music style. For example: a singer who have many kinds of music style, such as rock, hip-hop, jazz and so on, we can call it a pop music singer. In the late 1950 s, a young people who called Elvis Presley created the pop music with many kinds of music. Since then, pop music just like a whirlwind swept the world music. His songs had been popular and continued for a long time. The Beatles were the most influential band of the pop music; it affects the rock band's music and development after 1960 本文来源：https://www.wddqw.com/doc/8e845a2b2f60ddccda38a0d8.html