First of all, we need to understand the normal change curve of blood glucose after a meal. After a meal in fasting state, blood glucose usually starts to rise after half an hour and one hour, reaches the peak after one hour, gradually drops after two hours, and basically drops to fasting level after three hours. When blood glucose reaches its peak one hour after meal, insulin secretion also increases, insulin level starts to drop in two hours, and insulin level drops to fasting state in three hours. The change time of blood glucose in normal people is synchronized with insulin. If the release of insulin is delayed, the blood glucose two hours after meal will be higher than one hour, which indicates that the patient has problems with insulin secretion and may be accompanied by impaired blood glucose metabolism. It is necessary to control the diet and exercise, and if necessary, do glucose tolerance test to assess the blood glucose situation.