Practice method: Take supine position and bend your legs. After rubbing your hands, massage Yin Hui Point with your left hand. The speed and intensity of massage should be adapted, and the number of massages should be silently counted from 1 to 100. That is, the number of massages, one up and one down is 1 time. When Yin Hui's acupoints feel bloated with heat, stop the massage. With the increase of strength and physical strength, you can increase the number of massages. When practicing this skill, you should think about the yin points.