When the lips are lightly closed and the teeth are fastened, the tip of the tongue will naturally lightly abut between the upper palate and the upper gums (actually, it is the inner side of the intersection of the gums), and the tongue should never be tilted, and forcibly abut against the upper palate. The tongue should be straight and not curly, light and not heavy, otherwise excessive force will cause mental and muscle tension, and it is difficult for the body and mind to enter the realm of practice.

Meditation is often full of body fluid, clear and sweet. At this point, the body fluid is swallowed into the abdomen by swallowing. Is to keep the tip of your tongue still, suck body fluids to the root of your tongue and swallow them slowly. It is said that this way of swallowing can directly enter Ren meridian and turn into Yin essence, which is a shortcut to produce sperm and a wonderful way to keep fit.

In practice, there is generally no need to deliberately lick the upper jaw with your tongue. If you feel uncomfortable in the upper jaw of your tongue, which will affect your practice, you don't need to ask this part to be in place. When it is necessary to take over the Du meridian after dredging it, there will naturally be magnetic attraction to make the tongue stick to the upper jaw and penetrate the Ren meridian.

The functions of "tongue licking the palate" are: first, promoting fluid production; second, opening the channels of Ren and Du; With the extension of practice time, a large amount of saliva will inevitably be produced in the oral cavity during the practice. At this point, divide the saliva into three mouths, swallow it slowly at will and send it to the abdomen. In ancient China, saliva was called manna, manna and body fluid, which shows that the ancient people paid attention to saliva, which has the function of nourishing the spleen and stomach and protecting the kidney. Swallowing body fluids naturally becomes an important health preserving method.