Postprandial blood glucose refers to the blood glucose value measured 2 hours after meal, which is an important indicator for early diagnosis of diabetes. Since human blood glucose can be influenced by itself and external factors to fluctuate, whether postprandial 2h blood glucose 9.3mmol/ is normal or not, different people have different requirements, and it cannot be analyzed by general population, young diabetic patients and old diabetic patients. 1. General population: Patients without diabetes, postprandial 2h blood glucose 9.3mmol/L should be analyzed whether it belongs to transient. If a high-sugar diet was carried out before, or strenuous exercise, or large emotional fluctuations occurred, it is considered a normal physiological phenomenon. If the above-mentioned conditions do not exist, it is an abnormal state. The normal human 2h postprandial blood glucose range is 4.4-7.8mmol/L. If it is greater than 7.8mmol/L and less than 11.1mmol/L, it belongs to impaired glucose tolerance. Although it does not reach the diagnosis standard of diabetes, it should also control blood sugar to avoid developing into diabetes. 2. Young diabetic patients: If the diabetic patients are relatively young and have no obvious complications, 2h postprandial blood sugar at 9.3mmol/L belongs to abnormal state. Generally, this part of patients should control their postprandial 2h blood sugar within 8.5mmol/L, fasting blood sugar within 7.5mmol/L and glycated hemoglobin within about 6.3%. The better the glycemic control of diabetic patients, the less likely to have complications; 3. Older diabetic patients: If the diabetic patients are old and combined with cardiovascular and cerebrovascular complications, such as cerebral thrombosis, cerebral hemorrhage, diabetic nephropathy with inconvenient movement, or the presence of coronary artery bypass surgery, diabetic foot amputation, etc., then the postprandial blood sugar of 9.3mmol/L is mostly regarded as normal. Since elderly diabetic patients are less active and have a significantly higher risk of hypoglycemia, the danger of hypoglycemia is more serious than hyperglycemia, so the blood sugar standard is slightly higher than that of young people.