College students refer to a group of people who are receiving basic higher education and professional higher education, have not yet graduated or have graduated from higher education and entered the society. As the frontier group of new technologies and new ideas in society, college students, as senior professionals trained by the state, represent young and energetic people, are the main force of pioneering construction and creation, and are the main group to promote social progress.

There are usually many ways to enter the university according to the level: junior college and undergraduate level-fresh high school graduates (including students from three schools) mainly take the national unified entrance examination for ordinary colleges and universities, as well as high school walks, independent university enrollment and single recruitment; In the past, most graduates with technical secondary school education took part in adult college entrance examination, national open education and online education (distance education (online education) in colleges and universities is a special form of education, which is between adults and ordinary people), and electronic registration is only possible after undergraduate studies take the national public examination.

Hair dyeing is one of the most common means of modern makeup, which uses plants (such as avocado, henna, Polygonum multiflorum, etc. ) or chemical pigments to dye the hair in the desired color. This is one of the most common services in modern barber shops.

There are two main uses of hair dyeing: one is to dye black to cover white hair; Second, for the sake of fashion, change the color of hair with the mood, cooperate with clothing and makeup, and fully show your personality. Dyeing hair has become a fashion. Young people can change the color of black hair with their moods, and fully display their personalities with their clothes and makeup. Middle-aged people have to dye black frequently because they keep growing white hair.