According to Chinese medicine, saliva has a very close relationship with the spleen and kidneys, and is the master of the spleen and kidneys, with the spleen being the “essence of the latter” and the kidneys being the “essence of the first”, and the health and longevity of a person is closely related to the function of the spleen and kidneys. Therefore, Chinese medicine health care is particularly important to the role of saliva. Gargling and swallowing saliva has a very good effect on the prevention of oral mucosa and tongue atrophy in the elderly, and can also prevent bitterness and bad breath. This health care way more and knocking teeth or qigong combined with 1, first knocking teeth, followed by the tip of the tongue stirring teeth, first left and then right, first up and then down, gently stirring 30 times in turn, the force should be soft and natural, and then the tongue against the palate, so that the oral cavity accumulate saliva, saliva full mouth and then drumming gargle more than 10 times, and finally divided into three mouth slowly swallowed, with the idea of sending to the Dantian under the umbilicus. This is the famous Chinese medicine health “red dragon stirring Tianchi.” This method of walking, sitting and lying, regardless of form, early morning, lunch break, before bed or other free time can be done. 2, can be combined with the practice of qigong, with gargling and swallowing. Sit upright, excluding distractions, tongue against the palate, teeth closed, after adjusting the breath into the quiet, saliva source and industry, until the saliva is full mouth, low slowly swallowed, and sent to the Dantian with the idea.