The 3-hour postprandial blood glucose level is close to the fasting level, which is approximately between 3.9 and 6.1 mmol/L for normal people. For type 1 and type 2 diabetic patients it is recommended that the non-fasting blood glucose target should be <10.0 mmol/L, and the specific blood glucose range needs to be controlled according to the doctor’s prescription if complications exist. Under normal circumstances, the fasting blood glucose range corresponds to 3.9-6.1 mmol/L, 2 hours after the meal blood glucose value should be <7.8 mmol/L, 2 hours after the meal, blood glucose began to decline, usually 3-4 hours after the meal blood glucose is close to the standard of fasting blood glucose, the normal person's fasting blood glucose will be in the range of 3.9-6.1 mmol/L. Generally type 1 and type 2 diabetics are advised to keep fasting blood glucose levels around 4.4-7.0 mmol/L, with a non-fasting blood glucose target of <10.0 mmol/L, and glycated 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. For patients with abnormal blood glucose levels, it is recommended to consult the endocrinology department of a regular hospital for regulation.