Recently, I read the “Three Books of Medicine of King Yang Shan” and had a deep insight, so today I would like to share with you that “no medicine should be taken without illness”. All things are born with the qi of heaven and earth, but the qi they hold is different, and each has its own bias; man is the spirit of all things, and the qi they hold is no different from the qi of heaven and earth. The disease is also born because of the yin, yang, cold, heat, with the drug of bias, to save the life of the bias so named medicine. The top product is only and moderate, the lower steely ear. The grains are the most pure, for people to eat the goods, but also to cure hunger and not to cure full, full and then eat for the disease to stay. The grains should not be used too much, let alone drugs? The meaning of the above is simple and clear, most people can understand, that is, all drugs have a partial nature, or partial cold, or partial heat, it is this partial nature to treat disease. The drug is divided into upper, middle and lower grades, the upper grade of the drug is mild and can be used to regulate the long service, the lower grade of the drug is harsh and fierce, generally in the disease that is stopped, can not be taken for a long time, but also the reason why the bias is significant, in the treatment of disease in the party to show the efficacy. The earliest extant Chinese herbal medicine monograph “Shennong Ben Cao Jing” mentions that the upper product is non-toxic, the main nourishing life, such as ginseng, gum; the middle product is non-toxic or toxic, with the effect of tonic and treatment of disease, such as deer antler, safflower; the lower product is more toxic, mostly to remove cold and heat, break accumulation, the main treatment of disease, such as epilobium, rhubarb. The “poison” mentioned in the article is not what we call “poison” today, but refers to the obvious bias of the drug. In fact, most of the patients who come to the clinic are suffering from one kind of discomfort or another, which is not the so-called “disease free”. However, it is not recommended to take medicine for people who do not have diseases. The original article gives a very simple example: grains and cereals are the most moderate in nature, and we can only eat them in moderation at three meals a day. Therefore, the drug should not be applied even more freely.