Glycated hemoglobin 6.7% is higher than the normal value, if at the same time appear “three more and one less” clinical symptoms, generally can be diagnosed as diabetes mellitus, recommended to further improve the fasting, postprandial 2 hours blood glucose and other tests. Glycated hemoglobin mainly reflects the average blood glucose level of the human body in the past 2 to 3 months, and its normal value is generally 4.0% to 6.0%. If fasting blood glucose ≥7.0mmol/L, or two-hour postprandial blood glucose ≥11.1mmol/L, or random blood glucose ≥11.1mmol/L, or glycated hemoglobin ≥6.5%, and at the same time appeared in the diabetes symptom of “three more and one less” (drinking more, eating more, urinating more, and weight loss), after reviewing the symptoms, you can be Diabetes mellitus can be diagnosed after review. It is recommended to improve the indicators of fasting blood glucose and postprandial blood glucose. If the glycosylated hemoglobin is 6.7%, or if there are uncomfortable symptoms, it is recommended to consult a doctor immediately, improve the relevant tests, make a clear diagnosis, and actively treat the disease, so as to avoid delaying the condition.