What are the ten common malignant tumors in China: lung cancer, stomach cancer, esophageal cancer, intestinal cancer, liver cancer, cervical cancer, breast cancer, leukemia, malignant lymphoma, nasopharyngeal cancer and other ten tumors. Among them, lung cancer, stomach cancer, esophageal cancer, liver cancer, breast cancer and cervical cancer are the most common, accounting for about 70%-80% of all malignant tumors. Prevention of tumors: ①Create good habits to reduce or eliminate the risk of cancer-causing factors. ② Actively treat pre-cancerous diseases. ③Maintain a good and happy mood and find fun in life. ④ Keep poultry raised in the family away from the residence. ⑤ Take reasonable food to reduce the intake of carcinogenic substances and carcinogenic precursors in food; have a balanced diet structure; increase the intake of protective nutrition. ⑥Please pay attention to early and regular medical checkups for tumor prevention. Bowel cancer prevention dietary advice 1. Eat less or no food rich in saturated fat and cholesterol, including: lard, butter, fatty meat, animal offal, fish roe, etc. 2. Limit vegetable oil to about 20-30 grams (about 2-3 tablespoons) per person per day. 3.No or less fried food. 4.Eat moderate amount of foods containing unsaturated fatty acids, such as olive oil, tuna, etc. 5.Supplement with more than 35 grams of dietary fiber daily. 6, eat more food rich in dietary fiber: konjac, soy and its products, fresh vegetables and fruits, seaweed, etc. 7.Replace fine grains with some coarse grains. 8, eat more fresh vegetables and fruits to supplement carotene and vitamin C. 9, moderate consumption of walnuts, peanuts, dairy products, seafood, etc., to supplement vitamin E. 10, pay attention to the intake of malt, fish, mushrooms and other foods rich in trace elements selenium.