Postprandial blood glucose generally refers to 2 hours postprandial blood glucose. Whether 7.9mmol/L is normal should be judged according to different groups of people. In case of diabetic patients, it can be basically regarded as normal; in case of pregnant women or general population, 7.9mmol/L is slightly higher than the normal value, the postprandial 2 hours blood sugar should be checked again and corresponding measures should be taken according to the test results. 1. Diabetic patients: If they are diagnosed diabetic patients, controlling fasting blood sugar at 6.0-6.5mmol/L and postprandial 2 hours blood sugar at 7.0 8.0mmol/L, it can be regarded as being in the basic standard; 2. Pregnant women: the normal fasting blood sugar of pregnant women should be 3.1-5.6mmol/L, and the 2-hour postprandial blood sugar <7.8mmol/L. At this time, if the pregnant women's 2-hour postprandial blood sugar 7.9mmol/L is slightly higher than the normal value, they should be vigilant and have a review to clarify whether they are suffering from gestational diabetes; 3. General People: If it is the general population, the blood sugar 7.9mmol/L 2 hours after meal is higher than the normal value, and the normal should be <7.8mmol/L. It is recommended to measure again, if the blood sugar is still around 7.9mmol/L 2 hours after meal, it belongs to abnormal glucose tolerance. Patients should have overall control of the calories eaten daily and exercise in moderation to reduce the occurrence of diabetes.