Pre-meal blood glucose is generally not used as a clinical indicator to determine whether blood glucose is normal or not, and commonly used indicators include fasting blood glucose, 2-hour postprandial blood glucose and random blood glucose. With reference to fasting blood glucose, 9.4 mmol/L is on the high side and generally requires treatment. The normal range of preprandial blood glucose can refer to the normal range of fasting blood glucose, i.e. 3.9~6.1mmol/L, so preprandial blood glucose of 9.4mmol/L is on the high side. However, it is recommended to conduct intravenous fasting blood glucose, 2-hour postprandial blood glucose or random blood glucose measurements under the guidance of a doctor, combined with the typical clinical symptoms of three more and one less, namely, “drinking, eating, urinating, and weight loss” to clarify the diagnosis of diabetes mellitus. Once the diagnosis of diabetes mellitus is confirmed, timely intervention is needed, such as dietary control, controlling the total calorie intake, maintaining a low-sugar, low-fat diet; appropriate physical exercise; and the use of hypoglycemic drugs, such as metformin and gliclazide, as prescribed by the doctor, to keep blood glucose within a reasonable range. When abnormal blood glucose value occurs, it is recommended to go to the hospital as soon as possible and cooperate with the doctor for active treatment.