The control target of blood glucose after insulin injection, generally fasting or preprandial blood glucose control below 7.0 mmol/L, 2 hours after meal blood glucose control below 10.0 mmol/L and glycosylated hemoglobin control below 7.0%, is a suitable standard for most patients. For young and strong patients without complications, the control target can be stricter and can be a little bit lower, while for elderly patients, patients with heart disease or risk of other complications, the control target can be relaxed, such as fasting control around 7.5mmol/L, 2 hours after meal control around 11.0mmol/L, and glycosylated hemoglobin can be relaxed to around 7.5%, so It must be determined according to the specific situation of the patient.