“Intestinal Jiu An” and “Intestinal Cure Jiu An” Colorectal cancer is the fourth most common malignant tumor in China. In recent years, with the change of people’s living habits, the incidence rate of colorectal cancer has been on the rise year by year and the trend of rejuvenation. The incidence rate in coastal areas is close to that of developed countries. Therefore, it is necessary to ensure the long term stability of the colon, so as to keep away from cancer. “The occurrence of colorectal cancer mainly includes environmental factors and individual factors, the former refers to dietary habits, intestinal bacteria, chemical carcinogens, etc., and the latter refers to gene mutation, precancerous lesions (adenoma, schistosomiasis, chronic ulcerative colitis), etc. Among them, dietary habits are our daily life, and the incidence rate is close to that of developed countries. Among them, dietary habits are the factors that we are most exposed to in our daily life, most likely to change, and most closely related to colorectal cancer. Nearly 90% of colon cancers can be prevented and controlled by proper diet. Foods that can prevent colon cancer include: (1) Foods containing fiber: coarse grains, purple cabbage, soybeans, buckwheat, green beans, sweet potatoes, corn and so on. (2) Foods containing selenium: seafood, animal liver and kidney, etc.; foods containing vitamin D: cod liver oil, animal liver, egg yolk. (3) Foods containing calcium: shrimp, beans, dairy products, green vegetables, hairy vegetables, etc. Other preventive measures include avoiding obesity, exercising more, and banning smoking. In short, keep your mouth shut, walk more (more exercise), in order to “intestines of long peace”.