As a health institution of traditional Chinese medicine, Yuncaotang has rich experience and professional knowledge. According to the theory of traditional Chinese medicine, gray hair is mainly related to kidney deficiency and deficiency of both qi and blood. Yuncaotang can improve the internal balance of the body, promote the circulation of qi and blood, and enhance the kidney function through TCM conditioning, acupuncture and massage, so as to achieve the effect of blackening hair.