1. Glycated hemoglobin is an indicator to judge the blood sugar situation in the past three months, fasting blood sugar 5.6%, and glycated hemoglobin can be reduced to 7% in 2-3 months. After 3 months of treatment, glycated hemoglobin is still above 7% and insulin is used. 2, the higher the glycated hemoglobin the more complications, 8-10% more complications, 6-7% complications are not much difference. High fasting blood glucose is generally more than five years, but high postprandial indicates a longer disease duration. 3.Glycated hemoglobin 9% or more, the whole line of blood sugar are high. Glycosylated hemoglobin 8.4% or more to lower fasting blood glucose is more important, glucose-lowering treatment 2-3 months to recheck glycosylated hemoglobin is meaningful.