A good lifestyle (diet control, exercise, smoking cessation, etc.) is an indispensable and extremely important measure and tool before giving medication for diabetes. Generally speaking, it is crucial to achieve weight, lipid, blood pressure and blood glucose standards; avoiding or reducing complications and obtaining a good quality of life are the goals. For different stages of diabetes, the treatment plan should be individualized and the treatment should be comprehensive. New patients should be screened for diabetes in the following high-risk groups (1) Family history of diabetes. (2) Overweight or obese (especially abdominal obesity). (3) Gradual or sudden weight loss in the last 6 months. (4) Women who have given birth to a large baby (weighing more than 4 kg). (5) Those with a history of hypertension, hyperlipidemia, coronary artery disease, or cerebral infarction. (6) People who have had high blood sugar in the past or are in the pre-diabetic stage. (7) Those who have no clear cause of weakness and/or dry mouth and thirst. (1) Oral glucose tolerance test (OGTT test) – blood sampling; (2) Liver and kidney function, triglycerides, uric acid and cholesterol – blood sampling; (3) Glycated hemoglobin –(4) islet function (insulin, C-peptide) – blood sampling; (5) urine routine – urine retention; (6) other tests according to the needs of the condition are: electrocardiogram ( (6) Other tests according to the needs of the disease are: electrocardiogram (or ECG), carotid ultrasound, lower extremity vascular ultrasound, urine renal function, 24-hour urine protein quantification, urine microalbumin/creatinine ratio, electromyography, fundus examination, sympathetic skin reaction measurement, bone density, etc. Note for confirmed patients: Bring your previous outpatient medical records (other hospital records are acceptable). Fasting blood glucose and postprandial blood glucose within the past 1 week; glycated hemoglobin (HbA1c), blood lipids, liver and kidney function within the past 3 months. Relevant (heart, brain, kidney, neurological and other complications) examination reports within the last 3 months. Name and dosage of medication being taken (for elderly patients, if you cannot remember the name of the medication, you can bring along the medication box with you so that the doctor can accurately grasp your medication). If you are using insulin therapy, please make sure to remember the name (trade name or chemical name) and type of insulin (R, N, 25R, 30R, 30/70R, 50R, etc.), and if necessary, take a picture of it on your cell phone and bring it to the hospital; if you plan to go to the hospital on the day of your visit for the relevant biochemical examination, please make sure to keep an empty stomach. Random (finger) blood glucose tests are not restricted by whether you have eaten or not.