April 15th to 21st is the 29th National Cancer Prevention and Control Promotion Week. This year's theme is "Comprehensive Action for Cancer Prevention and Control - Whole Population, Whole Cycle, and Whole Society", aiming to actively advocate that everyone is the first responsible person for their own health, have a correct understanding of cancer, actively prevent and control cancer, implement the principle of three-level cancer prevention, actively participate in cancer prevention health examinations, and achieve early prevention, early detection, early diagnosis, and early treatment. The cancer prevention and control action proposed in the "Healthy China Action (2019-2030)" clearly states that by 2030, the overall 5-year survival rate of cancer should not be less than 46.6%, the awareness rate of core knowledge of cancer prevention and control should not be less than 80%, and the early diagnosis rate of key cancer species in high-risk areas should reach 55% or above and continue to improve. Experts suggest that prevention is the most cost-effective and effective health strategy. The prevention of tumors can be divided into first, second, and third levels. By doing a good job in the third level prevention of malignant tumors, one-third of cancer can be avoided; Enable one-third of cancer patients to achieve clinical cure or even complete cure through early detection, diagnosis, and treatment; It can also alleviate the pain of the remaining one-third of advanced cancer patients, thereby extending their survival period. Ma Jie, Standing Committee Member of the Minimally Invasive Cancer Professional Committee of the China Anti Cancer Association: Primary prevention is how to prevent oneself from developing tumors when there is no tumor in the body, and try to exclude the environment that induces tumor occurrence; Secondary prevention refers to the possibility that there may be tumors and abnormal cells in the body. In this case, how can various tumor screening methods be used to achieve early diagnosis and treatment; Third level prevention refers to the diagnosis of tumors in the body, and how to achieve multidisciplinary and comprehensive treatment, with the possibility of recovery, and how to prevent them from further developing or even coexisting with them. Prevention of cancer screening is crucial. Experts point out that in order to detect cancer early, tumor screening is necessary, with the aim of early detection of tumors or identifying potential high-risk factors for tumors, and targeted screening of high-risk populations. Cancer screening needs to select examination items according to age, gender, occupation, family history, etc. Through cancer prevention physical examinations, early detection of cancer patients or high-risk groups, and early intervention and treatment can improve the cure rate and reduce mortality. Ma Jie, Standing Committee Member of the Cancer Minimally Invasive Professional Committee of the China Anti Cancer Association: We recommend that people over 40 years old undergo regular screening, such as every year or two years. There are also different screening contents for gender differentiation, such as breast screening for women. The most basic and simple screening content for all populations, such as lung CT, neck and abdominal ultrasound, and the detection of hematological tumor indicators. For patients with a family history, especially those with a family history of intestinal cancer, gastroscopy should be performed regularly. We are also working hard to develop some blood screening projects, which can detect cancer early by detecting some indicators in the blood. Various new screening technologies can make tumor screening more convenient. Care for life science and cancer prevention, starting from daily life. Expert advice: Care for life science and cancer prevention, must start from daily life, and strive to eat reasonably, maintain exercise, and improve