The normal range of postprandial glucose value is between 4.4mmol/L and 7.8mmol/L. If it exceeds 7.8mmol/L, it means that there is a problem with blood sugar. If the blood sugar is between 7.8 mmol/L and 11.1 mmol/L, it means that it is abnormal glucose tolerance. Abnormal glucose tolerance can be controlled by not taking glucose-lowering drugs, but by changing the habits of life, such as low-sugar diet, low-fat diet and strengthening exercise. If the blood sugar after 2 meals is greater than or equal to 11.1mmol/L, diabetes can be diagnosed. The basic treatment for early type 2 diabetes is diet and exercise control. If it is still high blood sugar after 3 months, it is recommended to start activating glucose-lowering medication.