It’s true. According to a search on JD.com’s official website, women in this village have long used fermented rice water to wash their hair. The fermented rice water is rich in a variety of probiotics, amino acids, bifid yeast and other highly active small molecule substances that are beneficial to scalp health. It can delay the aging of the scalp and promote the production of melanin. Therefore, the hair of Hongyao women is black and smooth, so it is true.