A two-hour postprandial blood glucose of 8.9 mmol/L is generally not normal and is on the high side of the range. The two-hour postprandial blood glucose is calculated from the beginning of eating, the blood glucose concentration measured two hours after eating, the normal two-hour postprandial range is less than 7.8mmol/L, so the two-hour postprandial blood glucose 8.9mmol/L belongs to the high blood glucose, not normal. Fasting blood glucose is less than 7.0mmol/L, but the 2-hour postprandial blood glucose is greater than or equal to 7.8mmol/L and less than 11.1mmol/L, suggesting impaired glucose tolerance. At this point, patients can control their blood glucose level by controlling their total calorie intake, maintaining a diet low in sugar, salt and fat, controlling their weight, and exercising appropriately, 150 minutes of exercise per week is recommended. It is recommended to go to the hospital when abnormal two-hour postprandial blood glucose value occurs.