When you say smooth, you mean that at high temperature, the hair scales close instantly, so the hair is shiny and smooth to the touch. First of all, your hair dryer needs high power. If you pay attention to it, you will find that the hair dryer in the barber shop is bigger than that in the average family. Second, the method of blowing hair is that the curly hair comb pulls the hair up from the hair root to the hair tip, and the action is fast. After a long time, the hair will burn. If the action is too fast, the hair will not close the scales instantly, and repeated blowing will not have a shiny effect. The angle of pulling is about 45 degrees, so that the hair roots can be completely dried. Therefore, when blowing hair, it, it has to be divided into the end. It is difficult to blow your hair by yourself, but you can still approach the level of a barber shop with more practice.