If the glycation is higher than normal, it can only be suspected that there is diabetes, and can not be directly diagnosed as diabetes, mainly because the current diagnostic criteria for diabetes in our country glycated hemoglobin is a reference, and can not be used as a diagnostic criterion. Moreover, the standard of glycated hemoglobin measurement in our country is not uniform enough, so the measured value varies greatly, and it is impossible to form a uniform standard. Therefore, for patients with high glycosylated hemoglobin, it is necessary to go to the hospital for a standard oral glucose tolerance test, and if the results of this test show that the blood glucose reaches the diagnostic standard of diabetes, the diagnosis of diabetes can be confirmed.