The control target of diabetes needs to refer to three factors: i) fasting blood glucose; ii) postprandial blood glucose; and iii) glycosylated hemoglobin, which can reflect the average blood glucose level of patients in the last 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 glycated hemoglobin at less than 7%. For most adults, a reasonable glycohemoglobin control goal of less than 7% is appropriate, while for newly diagnosed, young patients with type 2 diabetes without significant complications, a more stringent glycohemoglobin control goal 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 glycated hemoglobin control goal may be used. For this group, glycemic control is considered to be achieved when the glycosylated hemoglobin is less than or equal to 8%.