It is best not to eat after 10:00 pm the day before the second day of the physical examination, as fasting time of at least 8 hours is required before the physical examination. If the fasting time is not enough will affect the accuracy of the physical examination results, will directly affect the blood biochemical examination and abdominal ultrasound examination. It is also recommended to eat as light as possible the night before, eat easily digestible food, such as porridge, noodles and other more digestible food, and do not eat too much. If you are too full or consume too greasy or sweet food, it will lead to blood tests the next day, blood glucose in the blood, triglycerides, cholesterol and low density cholesterol in the blood lipids will be affected to varying degrees and there may be a transient increase. Do not drink too much alcohol either. If you drink too much alcohol the night before, it will affect the liver function test in the blood test and the transpeptidase will be elevated to varying degrees.