Chinese medicine believes that the back is the main meridian of yang, and the bladder meridian of the foot sun runs through the whole body on both sides of the spine, and there are 53 acupuncture points on both sides of the back. Moreover, all the five internal organs are tied to the back, such as heart, liver, spleen, lung, kidney, gallbladder, large intestine, small intestine, bladder, triple energizer and twelve shu, which are channels for activating qi and blood and connecting viscera. Massage can stimulate these acupoints, and play a role in dredging meridians, promoting qi and blood circulation, strengthening yang and dredging collaterals, nourishing the heart and calming the nerves, balancing yin and yang, and harmonizing. Modern medicine has proved that a large number of powerful immune cells are dormant under the skin of human back. Back massage can stimulate these cells and activate their functions, so they "wake up" and rush to all parts of the body, join the battle ranks, promote blood circulation in the back and even the whole body, and then promote blood circulation in the local and even the whole body through the conduction of the nervous system and meridians, enhance the functions of endocrine and nervous system, improve the immunity and disease resistance of the body, and then reconcile the whole body. Therefore, back massage can achieve the purpose of treating diseases and strengthening the body.