Most people talk about cancer, but what is cancer? However, many people are not clear about it. In an interview with Vice President Ma Xuezhen of Qingdao Medical Group, the reporter learned that there are two types of tumors: benign tumors, which are mostly spherical and nodular in shape, and often surrounded by an envelope, so they are clearly demarcated from normal tissues and can be moved by touching and pushing. ”Generally speaking, the chance of cancer increases with age. Before the age of 30, leukemia and malignant lymphoma are the most common types of cancer. After the age of 30, lung cancer, esophageal cancer, stomach cancer, liver cancer, breast cancer, cervical cancer and colon cancer are the most common types of cancer.” Experts emphasize that in the past decade, the age of cancer has a tendency to be younger. Cancer in young people is relatively more malignant and has a poor healing process. Everyone has the possibility of developing cancer, but why do some people living in the same environment suddenly develop cancer while others do not? To this, Vice President Ma Xuezhen replied, “It is closely related to people’s lifestyle, temperament and personality, eating habits, genetics and so on.” He also said that it is easy to see through the above main causes of incidence that about 60% to 80% of cancer patients are man-made, and it can also be said that cancer is a man-made lifestyle disease. Unhealthy lifestyles include four kinds of unreasonable diet, smoking, excessive psychological tension and stress and lack of exercise. Therefore, reducing or eliminating these man-made factors can prevent 60 to 80 percent of cancers. ”It is human beings themselves who lead to the increase of tumor incidence through the destruction of living environment and bad living habits, so the prevention of tumor is especially important.” Ma Xuezhen told reporters that a scientific lifestyle can prevent cancer, so people should develop good living habits, in short, people are required to do the four words of “movement, stillness, moderation and rhythm” in daily life. In short, people are required to do the following four words in daily life: “movement”, “stillness”, “discipline” and “rhythm”.