In the past 20-30 years, represented by WHO, people have constantly called for revealing the true nature of cancer to facilitate the formation of a correct understanding of cancer, which has gradually become the consensus of the world. Happily, with the joint efforts of scientists from all countries, the mystery about cancer is being revealed little by little, and the correct understanding is becoming a reality step by step. Only that it will take time for this understanding to replace the wrong understanding in the past and to be widely accepted. In June 2006, the American Society of Clinical Oncology Annual Meeting (ASCO) held in Atlanta, USA, there was some exciting good news: Dr. Horming, the president of the meeting, announced at the opening ceremony that “the total number of cancer deaths in the United States in 2005 for the first time in a downward trend.” Since the United States began keeping cancer statistics in 1931, the number of U.S. cancer survivors has increased from 3 million in 1971 to more than 10 million in 2001. More than 2,000 fewer people died of cancer in the U.S. in 2005 than in 2004, for the first time since people began keeping death statistics, and each year in the past has been much more deadly than the year before. The turning point has finally occurred! This news expresses at least three things. First, cancer is controllable and curable, and “cancer ≠ death”, that so-called “cancer = death” is a false proposition, an untenable mental shackle on people’s heads. The figures above also represent a direction and a driving force. Secondly, it is the result of the relentless struggle between new medical concepts and old ideas. Imagine what it would be like if all medical personnel engaged in cancer research and clinical work were bowed down and subjected to the domination of the old concepts, not daring to take a step beyond the threshold. Thirdly, this set of figures also lets us feel the power of criticism and the power of creation. From this point of view, it has far exceeded the power of the figures themselves. A large number of experts, scholars and medical workers who are interested in oncology research will bravely take up their responsibilities. Based on this, since 2006, WHO and other international organizations have recently changed their approach and redefined “cancer” as an “incurable disease” to “a chronic disease that can be treated, controlled or even cured”. “It has been redefined as a chronic disease that can be treated, controlled and even cured. Domestic also has senior authority of medical oncology Sun Yan academician clearly pointed out: “In fact, for ordinary people, there will be more and more cancers in the future may be like diabetes, just a kind of common chronic diseases. As long as the strengthening of prevention, early detection, early treatment, coupled with the more accurate new drugs, cancer is not so terrible.” What does “chronic disease” mean? It means that it occurs slowly and heals slowly. Therefore, we believe that this is a fundamental change in the concept of cancer. 20 years ago, there was a discussion about which category of disease to categorize cancer into, and at that time, experts preferred to categorize cancer into a single category of disease. However, after more than 20 years of discussion, WHO officially announced in 2006 that cancer is a chronic disease. How to understand WHO defines tumor as a chronic disease? Does it mean that clinicians have changed their treatment rules? According to Sun Yan, an authority in the field of oncology and an academician of the Chinese Academy of Engineering, this contains two meanings. First, the pathogenesis of cancer is a long process. Figuratively speaking, the cancer problem we see is only the tip of the iceberg, and there is a big piece underneath. If we compare it to a play, what we have seen is only the last act, which is already the epilogue, and we have not seen the process of the occurrence and development of cancer. Since it has been recognized that there is a very long process in the occurrence of cancer, emphasis should be placed on prevention and early detection and treatment. In this sense, to identify cancer as a chronic disease is to move the focus of clinical work forward. In fact, there is a consensus that cancer prevention and treatment must be moved forward in order to produce results. Because these cancer-causing influencing factors existed 30 years ago, people have sufficient time to carry out prevention, achieve early detection, and completely block it at an early stage. If we do not move forward and let the cancer develop to an advanced stage, we can only see the worst consequences: patients suffer, doctors work hard, and it also makes people think that cancer is a very bad disease to treat. Secondly, it is to find ways to turn the cancer that has developed clinically into a chronic disease, so that the progress of cancer can be slowed down. Let cancer be controlled like diabetes and hypertension, and even let patients live peacefully with cancer for many years. Currently, we have many patients who can survive well with cancer with treatment. Defining cancer as a chronic disease is conceptually positive and proactive, and leaves a lot of room for people to fight it. In this conference, scholars also fully emphasized the importance of improving the quality of survival of oncology patients and its outstanding significance. In this conference, Quality of life (QOL) became a word that appeared most frequently. In other words, people no longer focus on the “elimination” of cancer cells or the “cure” of cancer, but advocate a different way of thinking, which is to slow down the growth of cancer cells or reduce their size in a milder, non-toxic and less invasive way. At the same time, more efforts are made to improve the quality of life of cancer patients and prolong their survival time.