The stomach belongs to the more important digestive organs of the human body, from top to bottom can be divided into cardia, gastric fundus, gastric body, gastric angle, gastric sinus, pylorus. The stomach is like a container, and like an irregular pipe, this pipe has a bend, the bend of the bend is slower on the outside, called the gastric bend; the inner side is more acute, called the gastric bend; the gastric bend side has a corner, it is called the gastric angle. The location of the angle of the stomach is in the middle of the upper part of the stomach body, and the angle of the stomach then goes down, between the pylorus and the body of the stomach, is the gastric sinus. The gastric sinus is the most common place to form lesions, such as ulcers, erosions, and even malignant tumors, all of which occur at a higher rate.