But when you watch all the health programs, you won't tell you to wash your hair with soap. The so-called experts serve enterprises, and surfactant shampoo can be produced on a large scale at low cost. However, the production cost of shampoo soap is high, it is difficult to produce it on a large scale, and there is a long waiting period after it is made. However, shampoo soap also has disadvantages. One is that it takes time to get used to it, especially when the hair is badly damaged. I feel particularly astringent at first, but I can't comb it when it is wet. Second, it is best to customize your own scalp characteristics. The refreshing degree and moisturizing degree of oil are very different; Third, hair will look fluffy for a while, and some people will think it is dry.