Yongquan point on the sole of foot is the second heart of human body, and it is the meridian point of kidney meridian of foot shaoyin, which has the function of tonifying kidney and consolidating constitution. Often rubbing Yongquan point, the qi of kidney meridian is like a steady stream of spring water, which gushes from the foot and irrigates all parts of the body. Therefore, Yongquan point plays an important role in human health, disease prevention, treatment and health care.