The control target of diabetes requires reference to three factors: first, fasting blood glucose; second, postprandial blood glucose; and third, glycated hemoglobin, which can reflect the average blood glucose level of patients in the past 2-3 months. According to the 2017 Chinese guidelines for the prevention and treatment of type 2 diabetes, it is appropriate to control fasting blood glucose at 4.4-7.0 mmol/L, non-fasting blood glucose at less than or equal to 10.0 mmol/L, and glycosylated hemoglobin at less than 7%. For most adults, a reasonable glycosylated hemoglobin control target is less than 7%, while for newly diagnosed, young type 2 diabetic patients without obvious complications, a more stringent glycosylated hemoglobin control target of less than or equal to 6.5% may be considered. For patients with a history of severe hypoglycemia, advanced age and multiple comorbidities, and a longer duration of diabetes, a more lenient glycosylated hemoglobin control goal can be adopted. For this group of people, when glycated hemoglobin is less than or equal to 8%, the blood glucose control can be considered to be up to standard.