1, Inhale: Don't open your mouth too wide, open it a little bit, match your upper and lower teeth slightly, and take a deep breath slowly before your tongue reaches your gums. 2, exhalation: the mouth is slightly open, the upper and lower teeth are slightly matched, and the tongue is pressed on the lower gum to exhale evenly. 3, swallowing: mouth closed. The tongue touches the palate and the throat swallows gas into the abdomen. 4, hold your breath: your mouth is closed, your tongue is on the palate, and you don't breathe. Relax and close your eyes. 5, gas collapse: the mouth is slightly open, the tongue reaches the gums, and the throat is opened in a short time, and the gas is briefly ejected, making a "ha" sound. 6, jet: the mouth is closed, the tongue is on the palate, the gas is short and forcefully ejected from the nostrils, making a "squeaky" sound, and the whole body is strongly contracted and the chest is expanded.