Yongquan point, the plantar point of human body, is located in the first third of the connecting line between the head and heel of toe suture lines 2 and 3 in the depression of forefoot. It is the lowest point of Shu point in the whole body and the first point of kidney meridian. Huangdi Neijing said: "The kidney comes from the spring, and the spring is full of heart." It plays an important role in human health, disease prevention and health care.