Fasting blood glucose of 8.7 mmol/L identifies type 2 diabetes. If the patient is newly diagnosed with diabetes mellitus, it is recommended to monitor blood glucose on the basis of dietary control (low-sugar and low-fat diet) and exercise control (pay attention to strengthening physical activity), and if the blood glucose still fails to meet the standard, it is recommended that medication to lower glucose treatment. If a patient with type 2 diabetes who has been taking glucose-lowering drugs for a long time still has a fasting blood glucose of 8.7 mmol/L, it means that the fasting blood glucose is still on the high side, and it is necessary to adjust the dosage of glucose-lowering drugs, and if necessary, use insulin for treatment.