According to legend, it was created by Kuaijing, a Taoist priest in the Western Han Dynasty. This method is to get up in the morning, sit up, or lie on your back and stand, hold your breath for a moment, exhale gently for three times, and then hold your breath and grind your teeth. If there is food in your mouth, rinse your mouth with your cheeks and tongue 30 times. When you rinse your mouth, saliva will be born in your mouth. When the saliva is full, you will send it to Tian Dan three times with your mind. Doing this three times is called three degrees and nine pharynx, which is called "eating Yuquan". You may not have much saliva at first, but you will get more after a long time. Practice once every morning and evening, and you will get a good health care effect, which can make your face moist, energetic and strong. Kuaijing's face is rosy and his teeth are strong because he eats Yuquan. The red dragon is the tongue and the huachi is the mouth. That is to say, in the case of non-diet, the tongue is often stirred in the mouth, so that the water in the body rises to the mouth, turns into saliva through the salivary glands, and then slowly swallows it, thus achieving the purposes of fitness, disease elimination and longevity. This method is to sit on the bed in the morning or in leisure (not limited by time and place), naturally relax the limbs, eliminate distractions, close your eyes and shut your mouth, first turn your tongue from the inside of the upper left gum to the right, and then turn your tongue from the outside of the upper right gum to the left; Then from the inside of the left lower tooth to the right, and then from the outside of the right lower tooth to the left, and so on for 9 times. Then I patted my upper and lower teeth 36 times and rinsed my mouth with saliva 9 times. Body fluids spontaneously and gradually fill the mouth, divided into three times, and slowly swallowed. Of course, there is also a simple way to produce saliva, that is, "lick your tongue and palate" for a few minutes, so that your mouth is full of saliva and taste manna. Adhering to the above methods can achieve the effect of Excellence, energy and spiritual integrity.