Many patients often ask how weight loss surgery is done and the process. At present, weight reduction surgery is mainly performed by minimally invasive laparoscopic surgical methods. In the past, many patients in our country and abroad also used open surgery, which is currently eliminated because of the large surgical incisions and trauma. Bariatric surgery patients are more obese patients, open surgery will be very traumatic, and through the laparoscopic surgery, can be completed by opening a few small holes in the belly, the surgery is less traumatic, post-operative recovery is also faster, the patient is also more easily accepted. The psychological impact will also be smaller. After the surgery, the patient will feel almost the same as if the surgery was not done, because there is no obvious large incision, so the patient will also be more willing to accept the weight loss surgery. The specific procedure varies depending on the type of surgery, but there are two types of surgery: gastric bypass surgery and sleeve gastrectomy surgery. This is achieved mainly by reducing the volume of the stomach and through gastrojejunal diversion. After reducing the volume of the stomach, the hormone secretion of the patient will be reduced, and the patient will feel less hungry and eat less.