Chronic disease is usually a general term for a disease that does not constitute an infection and has a long-term accumulation of formation, while acute, subacute, and chronic diseases are based on survival time as a basic criterion.In June 2016 the American Society of Clinical Oncology annual meeting announced the first downward trend in the total number of cancer deaths in the United States in 2005, a year in which the World Health Organization and other international agencies redefined cancer as treatable, controllable, or even curable chronic diseases. The CDC’s chronic disease management at all levels in China requires the reporting of chronic diseases, which also include cancer. First of all, cancer disease is a chronic process, evolving from normal cells to cancer cells and then forming tumors, which usually takes 10-20 years or even longer. Cancer occurs when risk factors severely damage the body’s defense system, the body’s ability to repair decreases, and genetic mutations in cells accumulate to a certain degree. It takes several years to develop from in situ cancer to invasive cancer. In terms of natural course, the common cancer known as the king of cancers, hepatocellular carcinoma, has a survival time of 3-6 months from discovery to death. It is estimated that from the beginning of cancer, that is, counting from elevated AFP, there is at least two years to develop to advanced stage, and the actual time from the development of a single cancer cell to elevated AFB is much longer, and the average insidious time of breast cancer is 12 years before the lump is clinically detected, and after diagnosis The natural course of the disease is more than 2-3 years, and 95% of early stage patients can be cured. After scientific and reasonable diagnosis and treatment, the survival rate of middle and late stage patients in three and five years has also increased significantly. Moreover, under specific conditions and for specific groups of people, cancer does not even have an impact on the quality of survival survival, that is, cancer patients do not die from cancer. It is a proven fact that autopsies find far more cancers than clinical appearances. 50% of cancers found inside autopsies of elderly people over 70 years old who died of non-cancerous causes were not detected during life and did not cause any damage to health, indicating that not all cancers have clinical manifestations, and many cancers can also survive with cancer.