The largest oncology hospital in China, with a population of about 1600, has about 3 to 4 people suffering from malignant tumors every year. Isn’t the incidence rate a bit too high? Can tumors be prevented? It is not easy to do so. However, there are a few commonly agreed upon points from domestic and international information. In order of their importance, they are as follows: 1. Have a happy life and treat the world peacefully. 2. 2.A regular life, long-term constant. 3, the treatment and control of existing diseases. 4.Clearance of bad habits and avoidance of carcinogenic stimuli. 5.Appropriate physical exercise. 6.People with family history should have regular checkups. The more people in the family have the disease, the more they should receive medical guidance.