The criteria for the diagnosis of diabetes include three points: 1. the presence of diabetic symptoms and a random blood glucose ≥ 11.1 mmol/L. Random blood glucose refers to blood glucose values at any time, while typical diabetic symptoms include dry mouth, excessive drinking, polyuria and weight loss without other causes; 2. fasting blood glucose ≥ 7 mmol/L. Fasting status refers to no caloric intake for at least 8 hours; 3. oral glucose tolerance test Patients who do not have diabetes symptoms but meet one of the above diagnostic criteria can be diagnosed as diabetic on the next day if they still meet one of the three criteria. 2010 American Diabetes Association ADA added the diagnosis of glycosylated hemoglobin ≥6.5%, but glycosylated hemoglobin has not been adopted as a diagnostic criterion for diabetes in China. This is mainly because laboratory standards cannot be standardized, so it is recommended that blood glucose be routinely included in physical examination items. If you have symptoms of dry mouth, excessive drinking, excessive urination and weight loss, you need to pay attention to diabetes and go to the hospital for blood glucose testing in time.