DJ (disc jockey) is a profession developed with hiphop culture and disco, which refers to disc makers in clubs, bars, live houses, warehouse parties, music festivals and other places. They exist in the form of playing songs, most of which are discharge sounds, but strictly speaking, they can play any style of music. At the beginning, DJ only played CD singles in the radio station. Later, it developed into disc playing. It is often misunderstood as a kind of music style or radio host