The purpose of health checkups is to prevent and detect pathologies early, so the timing of health checkups should be scientifically and reasonably controlled. In principle, health checkups should be conducted once a year. The interval for young people can be slightly longer. Middle-aged and elderly people should be examined strictly according to the prescribed interval. Different age, gender, occupation, family medical history, lifestyle habits, and past disease history determine that individuals should also focus on certain necessary items. Normal cholesterol testing is done every 5 years starting at the age of 35 for men and 40 for women. People with high blood pressure, diabetes, smokers and those at potential risk such as parents who died of heart disease before the age of 50 should have their cholesterol levels tested from the age of 20. From the age of 50, annual fecal occult blood, routine stool and rectal examinations should be performed, and colonoscopy should also be performed every 3-5 years in high-risk groups for early detection of colon cancer. From the age of 55, regular fundus examinations and hearing tests should be performed. Married women should attend gynecological screening and have a cervical smear every 1-3 years, and middle-aged women should also have regular breast examinations.