1.Regular medical checkups (including cancer screening), early detection and treatment of cancerous factors or precancerous lesions to avoid cancer; early detection of cancer and early standardized treatment to obtain a higher cure rate; 2.Maintain a normal weight throughout life and actively exercise; 3.Quit smoking and limit alcohol (limit intake of alcoholic beverages to no more than 1 cup per day for women and no more than 2 cups per day for men (1 cup is defined as 12 ounces of beer, 5 ounces of Wine or 1.5 ounces of 80° white wine (1 ounce = 30ml)); 4. Avoid strong sunlight; 5. Avoid taking unnecessary hormone supplements and drug abuse; 6. Avoid exposure to carcinogens, radiation exposure and some chemicals can cause cancer; 7. Eat a healthy diet for lifelong benefits: vegetables and fruits can effectively reduce the chance of many kinds of cancer, especially for colon cancer. Specific dietary guidelines are: consume no more than 4 ounces of red meat on average per day (within about 100-120 grams), avoid processed meats such as sausages and smoked sausages, reduce the intake of animal fats, eat a variety of non-starchy vegetables and fruits every day, minimize the consumption of sugary carbonated beverages, processed juices, etc., eat less desserts and candies, eat less refined bread, fried foods, make videos at high temperatures, eat less Smoked and baked, pickled food, do not eat moldy food, eat less fine grains, eat more whole grain food, etc.; 8, adjust the psychological state, and actively resolve the pressure.