2021-07-08 During the Song Dynasty, due to the constraints of rituals, foot massage gradually disappeared. To the Ming Dynasty, many medical doctors regarded it as a good way to maintain health, the famous Ming Dynasty medical doctor Li Shizhen in the "eight veins of the Qi Jing examination" pointed out that "cold from the feet", so the feet as the fundamental source of treatment. One of the secrets of longevity of Sun Simiao, the king of medicine, is to rub the soles of the feet every day, focusing on the Yongquan point.