folk songs: folk songs that are popular and full of national colors are called folk songs or folk songs. Folk songs have a long history, so their authors are mostly unknown. Folk songs are rich in content, including religion, love, war, work, drinking, dancing, festivals and so on. Folk songs not only express a nation's feelings and habits, but also have their own unique scales and emotional styles. For example, the prosperity of French folk songs, the enthusiasm of Italian folk songs, the simplicity of British folk songs, the grief and indignation of Japanese folk songs, the wild and uninhibited Spanish folk songs, and the tearful China folk songs all show strong national temperament and color. Pop song: pop song (pop song). Sometimes it can also be abbreviated as pop). The accurate concept should be commodity songs, that is, songs created for profit. It is a commercial music entertainment and all the' industrial' phenomena related to it. Its commerciality is primary, and its artistry is secondary. Folk songs are folk rock. 、