According to the experience and research of professional hairdressers, Yao Hong Wu Fang is a natural plant hair dye, which can effectively dye hair and change hair color. Red Wu Yaofang is rich in natural dyes, which can penetrate into the hair and make it black. In addition, Yao Hongchuan Wu also has the function of nourishing hair and increasing hair luster. Therefore, using Yao Hong Wu Fang shampoo can achieve the effect of blackening hair.