In 2006, the World Health Organization suggested for the first time that cancer is actually a chronic disease that can be regulated. Since it is a chronic disease, it also means that it occurs slowly and heals slowly. Why do we say that it occurs slowly? It is important to understand why people get cancer in the first place. Under normal circumstances, cells metabolize according to their respective growth cycles, constantly renewing and replacing themselves, and maintaining the normal function of the human body week after week. In this process, due to the influence of the external environment and the body itself, some cells have a particularly strong growth capacity and a particularly fast growth rate, and mutation occurs, resulting in the production of “precancerous cells”. Afterwards, about 1/3 of the “precancerous cells” will develop into malignant tumors under the action of various cancer-promoting factors. However, this evolution does not take place overnight, but usually over a period of 10-30 years. Therefore, this process can be prevented as well as detected, treated and cured through screening. For this reason, the World Health Organization suggests that regular medical checkups, learning to recognize the early signs of cancer, and seeking immediate diagnosis and treatment are important for cancer treatment. Unfortunately, the public does not pay enough attention to their own health, and most people only know how to “mend” when they are sick. However, we should pay more attention to the prevention of cancer and try our best to observe the following anti-cancer principles: firstly, to stay away from cancer-causing factors and change bad living habits; secondly, to have effective health check-ups every year; thirdly, to treat pre-cancerous lesions; and fourthly, to exercise in order to maintain physical and mental health. Even if you have a tumor, there is no need to be overly nervous. Cancer treatment is a long process. Originally, we have been committed to completely killing all tumor cells in order to eradicate the tumor, sometimes far beyond the scope of tumor cell invasion and the limit that the patient may bear. However, in reality, although many chronic diseases cannot be cured, patients can work normally and maintain a good living condition for a long time. Taking this as a reference, to maximize the patients’ ability to resist diseases, to control and reduce the harm of tumors on the body as much as possible, to make the patients have a good quality of life for a long time, and to “coexist peacefully” with tumors is undoubtedly a new generation of the direction of tumor treatment.