The first thing that an internist generally wants a patient to do in treating diabetes is to control diet and exercise in moderation, followed by treatment with glucose-lowering drugs and insulin injections. Many friends have a misconception until now that if they have diabetes, then they have an incurable disease. But this very traditional treatment can only temporarily control blood sugar, not cure it, and there is no way to stop the occurrence and deterioration of the accompanying symptoms. In addition, Chinese diabetics have poor compliance, and only 15% of diabetics have effective blood glucose control, which means that nearly 100 million diabetics have unsatisfactory blood glucose control. But is there really nothing that can be done about diabetes? No! Diabetes is traced back from the root cause of the disease to the metabolic disorder of high blood sugar due to insufficient insulin secretion. Therefore, in order to carry out thorough treatment, we must start from the root cause of the disease, which is insufficient insulin secretion in the body and prone to ketoacidosis. Gastric bypass surgery means gastric diversion surgery. Under normal circumstances, food passes through the stomach, duodenum, jejunum and ileum, and is digested and absorbed. Gastric diversion surgery is unique in that it alters the normal physiological flow of food. It works in two ways: 1. After the procedure, there is a diversion of food from the upper gastrointestinal tract, which no longer passes through the distal stomach, duodenum and upper jejunum. Inside the lumen of this part of the digestive tract, there is a large number of K cells distributed on the mucosa. As soon as the food is stimulated, the K cells secrete a large amount of insulin resistance factor, which makes the body insulin resistant, and this is the initial cause of the formation of diabetes. If a diversion is done, the upper digestive tract no longer receives food stimulation and K cells no longer secrete insulin resistance factor. 2. It is the incompletely digested food that can enter the middle and lower digestive tract earlier and stimulate the mucosa of the middle and lower digestive tract. After countless clinical practices, weight reduction metabolic surgery has developed into a mature treatment for diabetes, as well as the only method that can achieve a clinical cure for diabetes. As of 2013, more than one million type 2 diabetic patients in the United States, United Kingdom, Australia and other European and American countries have said goodbye to diabetes through surgery. In China, diabetes surgery has been carried out for more than 10 years, and the number of surgical cases has been large, and the results of the surgery have been recognized by all sectors of society. The unique feature of bariatric surgery is that it changes the physiological flow of food, which is accomplished through steps such as gastric blockage, gastrointestinal anastomosis, and enteroenteric anastomosis. After the surgery, the insulin resistance in the patient’s body is eliminated, and the way food flows through the body after the surgery also promotes insulin secretion in the patient’s body, reduces apoptosis and proliferates pancreatic islet cells, restores islet function, and recovers from diabetes. In addition to the most concerned blood sugar value, the patient’s hypertension, hyperlipidemia and hyperuricemia, which are all high-risk factors for cardiovascular diseases, can also be relieved. Other overweight and obesity complications such as fatty liver and apnea syndrome, which are common disorders, can also be improved.