Two-hour postprandial glucose of 8.2 mmol/L in diabetic patients (non-pregnant) is within the control range, which is considered to be well controlled and not very high. The postprandial glucose control target for diabetic patients should follow the principle of individualization, and the conventional target is <10.0mmol/L. This target is applicable to elderly diabetic patients who are newly diagnosed, have a short course of disease, have a low risk of hypoglycemia, and who apply non-insulinotropic glucose-lowering medication mainly, and who are good at self-care or who have good assisted living conditions. However, for elderly diabetic patients with expected survival >5 years, moderate complications and concomitant diseases, risk of hypoglycemia, application of insulinotropic glucose-lowering drugs or treatment mainly with multiple insulin injections, and poor self-management ability. It is possible to control 2-hour postprandial blood glucose to less than 11.1 mmol/L. Tight control of blood glucose levels improves cardiovascular risk factors, but also raises the risk of hypoglycemia in older patients with more comorbidities. Therefore whether a postprandial blood glucose of 8.2 mmol/L is reasonable varies from patient to patient and it is advisable to ask an endocrinologist.