Gastric RAC refers to a collection of small, regularly arranged veins in the body and fundus of the stomach found during gastroscopy. 1.RAC mainly refers to a large number of regularly arranged collecting veins in the fundus and body of the stomach during gastroscopy. These veins usually appear as tiny red dots and red lines during gastroscopy, and under normal circumstances, they tend to appear as regular starfish. 2. However, when these veins are irregularly arranged, it indicates that H. pylori infection may be present, and prompt carbon 13 or carbon 14 breath test is recommended to make a definitive diagnosis as well as to determine the severity of the infection. Therefore, the presence of H. pylori infection can be determined in patients using gastroscopic RAC. Once the presence of H. pylori infection is determined, it is recommended to choose the targeted quadruple drug treatment under the guidance of the doctor.