A 2-hour postprandial blood glucose of 8.7 mmol/L is on the high side for normal people and is within the glycemic control target range for diabetics. The 2-hour postprandial blood glucose value should be <7.8 mmol/L for normal people, and the recommended non-fasting blood glucose target is <10.0 mmol/L for type 1 and type 2 diabetics. Under normal circumstances, fasting corresponds to a blood glucose range of 3.9 to 6.1 mmol/L; 1 hour after a meal corresponds to a blood glucose value of 6.7 to 9.4 mmol/L, up to 11.1 mmol/L; 2 hours after a meal blood glucose value should be <7.8 mmol/L; 3 hours after a meal in general is to drop to the fasting level of 3.9 to 6.1 mmol/L. Generally speaking, patients with type 1 and type 2 diabetes are recommended to control the fasting blood glucose level at about 4.4~7.0 mmol/L, the non-fasting blood glucose target is <10.0 mmol/L, and glycosylated hemoglobin should be <10.0%, which is a more reasonable range. If complications exist, the specific blood glucose range needs to be controlled according to medical advice. Postprandial blood glucose 2 hours 8.7 mmol / L is recommended to the hospital, if necessary, repeat blood glucose or glucose tolerance test to clarify the diagnosis, if any discomfort in time to consult the doctor.