Customer first, service first classSelf-presentation is to demonstrate to others an important means of your own, self-description is good, or even directly related to the first impression you give people good or bad and beyond the smooth interaction or not. (2) self-introduction is not only a means to show their, and also a means of self-understanding. Ancient saying goes: "knowing those intellectual, confidante who specified", saying: "If spectators, Dangjuzhemi", can be seen, to self-understanding, an accurate positioning himself is not an easy task, but through the writing self-introduction, will itself a conscious sort.