Mainstream is a fashion, leading the trend of the times. For example, there is a kind of clothes that the general public likes, so that everyone can buy them to make their favorite clothes. Then the streets are full of such costumes, which is the mainstream, and it pursues the tendency of popularization. On the contrary, the non-mainstream pursues alternative personalization and tends to be unique. For example, a dress with several holes in the back makes the trouser legs long and short, so as to show its uniqueness and show its imperfect unique beauty, which is non-mainstream. But many people in today's society like this kind of unique beauty, especially teenagers. Since then, non-mainstream has unconsciously become a fashion, non-mainstream mainstream mainstream, which has made many people misunderstand his original appearance.