The normal range of 2-hour postprandial blood glucose in diabetic patients is based on the patient’s age, duration of diabetes mellitus, basal status, and concurrent diseases. 1. For patients who are young, with good basal status, without obvious complications, and with a short duration of diabetes, it is recommended to control blood glucose strictly, and the 2-hour postprandial blood glucose should be controlled at 4.4-8.0 mmol/L. 2. 2. For patients with long duration of diabetes mellitus, general basic status and few complications, it is recommended to control blood glucose at the general standard, i.e., the 2-hour postprandial blood glucose should be controlled at 6-10 mmol/L. 3. For patients with long duration of diabetes mellitus, poor basal status, many co-morbidities and short life expectancy, it is recommended that blood glucose control should be in the loose range, i.e., 2-hour postprandial blood glucose control should be in the range of 8-13.9mmol/L. Diabetic patients who are unable to determine whether their 2-hour postprandial blood glucose is normal or not should consult a regular hospital in a timely manner, and be assisted in determining this after the specialist has assessed their condition, and manage their blood glucose under the guidance of the specialist, and do not blindly use medication.