The latest standards for normal values of blood glucose are fasting blood glucose, 2-hour postprandial blood glucose, and so on. For example, the normal value of fasting blood glucose is less than 6.1mmol/L, and the standard of 2 hours postprandial blood glucose is not more than 7.8mmol/L. 1. Normal fasting blood glucose: normal fasting blood glucose is less than 6.1mmol/L. Fasting blood glucose is greater than or equal to 7mmol/L, considering the possible existence of diabetes mellitus. 2. Normal 2-hour postprandial blood glucose: 2-hour postprandial blood glucose is no more than 7.8mmol/L. If the blood glucose value exceeds the standard, it is recommended to have diabetes. If the blood glucose value exceeds the standard, it is recommended to consult the endocrinology department and carry out standardized treatment under the guidance of the doctor.