Saliva is closely related to longevity. It has been mentioned in many Chinese medicine books that full saliva and frequent swallowing can nourish the five internal organs, delight the skin and make people live longer. The ancients attached great importance to saliva health care. Since ancient times, health experts have regarded saliva as an important source of health, so they deified and alienated saliva and endowed it with the reputation of "golden jade liquid" and "Qiongjiang Yuquan".

Saliva, commonly known as saliva, is extremely precious in the eyes of Chinese medicine. Chinese medicine has always attached great importance to the maintenance of body fluids. Since ancient times, there has been a record that "body fluid is transformed from sperm". It is believed that frequent swallowing of saliva can moisten dry orifices, harmonize spleen and stomach, nourish five internal organs, smooth joints, replenish brain and marrow, and achieve the effect of prolonging life.

Therefore, one of the ten methods of TCM health care is pharynx and body fluid method.