3.Oral Glucose Tolerance Test (OGTT) is a glucose load test to understand the function of pancreatic beta cells and the body’s ability to regulate blood glucose, and is a confirmatory test for the diagnosis of diabetes. The sugar solution should be taken within 5 minutes. Blood glucose was collected before and half an hour, one hour, two hours and three hours after taking the sugar. During the 3 days before the test, the daily carbohydrate intake should not be less than 150g. During the test, no tea and coffee should be drunk, no smoking and no strenuous exercise should be done. Some hyperglycemic patients can bun meal test (eating standard bun 2 taels) instead of OGTT test. Normal fasting blood sugar is in 3.9~6.1mmol/L, fasting blood sugar up to 6.1~7.0mmol/L is impaired fasting blood sugar, 2 hours after meal blood sugar in 7.8~11.1mmol/L is impaired glucose tolerance, if fasting blood sugar is higher than 7.00mmol/L, and/or 2 hours after meal blood sugar is higher than 11.10mmol/L is diabetes. Glycosylated hemoglobin (HbA1C) Glycosylated hemoglobin is a very important indicator to determine whether the diabetic patient has good blood sugar control or not, and can reflect the patient’s blood sugar control in the past 8~12 weeks. In general, glycosylated hemoglobin 4%-6% indicates normal blood glucose control, 6%-7% indicates ideal blood glucose control, 7%-8% indicates average blood glucose control, 8%-9% indicates unsatisfactory control and needs to strengthen blood glucose control and adjust the treatment plan under the guidance of doctors. Glycosylated hemoglobin control goals for diabetic patients should be individualized and should be considered based on the patient’s age, disease duration, life expectancy, and severity of complications or comorbid conditions. For most non-pregnant adult type 2 diabetic patients, a reasonable HbA1c control target is <7%. For type 2 diabetic patients with a shorter disease duration, longer life expectancy, no complications, and uncomplicated cardiovascular disease, a HbA1c control target of <6.5% or even as close to normal as possible is recommended. For patients with a history of severe hypoglycemia, short life expectancy, significant microvascular or macrovascular complications, or severe comorbidities, or a long duration of diabetes, a relatively lenient HbA1c target (e.g., <8.0%) is recommended. It is generally recommended that diabetic patients have their glycosylated hemoglobin checked regularly every three months, and if the glycosylated hemoglobin meets the standard and the usual blood glucose monitoring is basically normal, the glycosylated hemoglobin can be checked once every six months.