The statement that diabetes is reversible in its early stages is not entirely true, but diabetes remission can be achieved through blood sugar control. Diabetes is a lifelong disease for which there is no cure. It can be stabilized with active and effective medical interventions as well as lifestyle interventions to control blood glucose. The state of glucose metabolism can be divided into three stages: 1. Normal population: the range of fasting blood glucose for normal people is 3.9~6.1mmol/L, while two hours after meal or random blood glucose is <7.8mmol/L; 2. Pre-diabetes: when fasting blood glucose is greater than or equal to 6.1mmol/L but less than 7.0mmol/L and 2 hours after glycemic load blood glucose is less than 7.8mmol/L, it suggests impaired fasting blood glucose. When the fasting blood glucose is less than 7.0mmol/L, but the 2-hour post glycemic load blood glucose is greater than or equal to 7.8mmol/L less than 11.1mmol/L, suggesting impaired glucose tolerance. At this time should be under the guidance of the doctor as early as possible diet and exercise management as well as drug therapy. 3. Diabetes mellitus: Typical symptoms of "three more and one less" (excessive drinking, excessive urination, excessive eating and weight loss) together with intravenous plasma glucose greater than or equal to 11.1 mmol/L or fasting glucose greater than or equal to 7.0 mmol/L at any time of the day, or glucose greater than or equal to 11.1 mmol/L at two hours after the glucose tolerance test, can be diagnosed. Diabetes is diagnosed when one of these three criteria is met. Therefore, it is recommended that patients with a diagnosis of diabetes be seen by a physician and follow their doctor's instructions on what treatment plan to choose.