1.Diversify your diet and don’t be partial to food. 2.Eat more vitamin-rich foods, including vegetables and fruits and animal liver, etc. 3, do not eat too much fat, eat more fresh vegetables. 4.Do not eat rotten and spoiled food. 5, do not drink alcohol, not more than 1 tael of alcohol per day. 6.Do not smoke, which is the most effective way to prevent lung cancer. 7.Pay attention to oral hygiene, treat oral diseases such as dental caries in time, and wear proper dentures to prevent the occurrence of oral cancer. 8.When eating, pay attention to chewing and swallowing slowly, and do not eat too hot food. 9.Do not overeat, do not eat burnt food, eat less fried food, and do not eat too much stimulating food. 10, pay attention to kitchen ventilation. 11, avoid exposure to the hot sun. 12.Do not abuse drugs, especially do not abuse sex hormone drugs and cytotoxic drugs to prevent the risk of cancer caused by drugs. 13.Promote women to breastfeed themselves during childbirth, which can reduce the occurrence of breast cancer. 14. Pay attention to sexual morality, sexual health, and advocate family planning to prevent or reduce the occurrence of cervical cancer, penile cancer and AIDS. 15.Strengthen physical exercise, have a regular life and avoid overwork to prevent cancer from taking advantage of the situation. 16.Cultivate an optimistic and open-minded personality.