Indications: headache, dizziness, neck pain, red eyes, tears, sinusitis, nosebleed, deafness, pneumatosis, stroke, mouth-eye deviation, malaria, fever, cold, belching and stiff neck. The second pulse of Ren Du originates from the Yin Hui point between the legs directly below the human body, and runs from the front of the body up to the pith point under the lip along the center. This meridian is Renmai. The Du Meridian, on the other hand, goes backwards along the spine from the point (some say Changqiang point), reaches the top of the head and goes forward between the eyes, reaching the gingival point of the oral maxilla. Ren meridian governs blood and Du meridian governs qi, which is the main meridian of human body. If Ren Du's two veins are connected, then the eight veins are connected; Eight veins are connected with hundreds of veins, which can further enhance physical fitness, strengthen tendons and bones and promote circulation. Ren-Du pulse is very important in TCM pulse diagnosis and Taoist health guidance. At the same time, because there are exaggerated descriptions in martial arts novels, for example, people with high martial arts can get through their own second pulse of Ren Du, and once the second pulse of Ren Du is opened, martial arts will advance by leaps and bounds, so it has become the most familiar name of one pulse. Renzhong point is the intersection point of Ren and Du meridians.