In daily life, people tend to talk about cancer, which is because in the past two to three decades, the incidence and mortality of cancer have been rising, according to the World Health Organization report: in many countries, more than one quarter of the cause of death is cancer. However, human beings are not helpless and powerless in front of cancer. Cancer can be prevented, detected and treated as early as possible, and it is possible to stay away from cancer through the establishment of scientific and correct lifestyles such as reasonable diet, strengthening exercise and adjusting mentality. The key to overcome cancer lies in early prevention, early detection and early treatment. The World Health Organization warns people, “Don’t die of ignorance”, and the best way to know the health status of your body at any time and intervene positively is to have regular medical checkups. Early screening is an effective way to prevent cancer. The reason why the mortality rate of cancer is high is that it is found late, and once it is found, it is already in the middle or late stage, which makes it difficult to be treated. It is gratifying to see that in today’s highly developed modern science and technology, people are able to find the precursors of cancer at an early stage and kill it in the “latent stage” through active treatment. “We need to take positive action for our own health. We should take positive actions for our own health, pursue a healthy lifestyle, and fully apply the civilization and achievements of human science and technology in the 21st century to escort a happy life! The following groups of people should do regular physical examination for tumors: 1, the annual physical examination of the unit is suitable to add some physical examination items for tumors; 2, people over 45 years old; 3, people with family history of tumors; 4, people with early signals of tumors; 5, people in areas with high incidence of tumors; 6, patients with suspected malignant tumors, who need to undergo further clinical examination; 7, patients with cancer who need to undergo monitoring of the disease and dynamic observation of the efficacy of the therapy after treatment. Observation.