Mencius and Li Lou have a saying: "Seven years of illness, three years of love." It has always been regarded as a classic by moxibustion experts and enthusiasts. Many people understand the meaning of this sentence this way: seven years of illness refers to a serious incurable disease, and three years of love refers to Ai Chen, which has been more than three years. Generally speaking, a serious illness or serious illness for more than three years requires the use of Ai Chen for moxibustion treatment to achieve good results. It makes sense to understand this sentence like this, because Ai Chen does have obvious advantages over Aisin. Ai Xin refers to moxa sticks made of mugwort leaves picked in those years. This kind of moxa stick contains more volatile oil when burning, so it has greater firepower, burns quickly and emits thick smoke, which often makes people feel burning and easily burns the skin. Moreover, its heat stays in the surface layer of the skin, and its function of reaching the meridians is very weak, which can not achieve better fitness and treatment effects. After more than three years, most of the volatile oil in Ai Chen volatilized, and after burning, the firepower was lasting and mild, with little smoke. The key point is that it has strong penetrating power and can directly reach the depths of meridians and viscera, so the curative effect is very good. There is also an understanding of this sentence, that is, seven years of serious illness, serious illness, it takes three years to adhere to moxibustion to play a role. Judging from the literal characteristics of moxibustion, this method of fitness and treatment requires that it can achieve therapeutic effects that other methods cannot achieve through long-term burning, so long-term persistence is a principle of moxibustion, and this understanding is also of certain significance to our moxibustion lovers, that is, it should be regarded as a health-preserving activity, and long-term persistence will definitely play a good role in physical health.