In recent months, 46-year-old Ms. Li’s stomach has been uncomfortable, there is always a feeling of fullness, can not eat, so easy to eat a little more to feel stomach pain, so go to the hospital to see a doctor. The doctor first suspected that Mrs. Li was suffering from gastritis and suggested that she do a gastroscopy, saying that she could clearly see the inside of the stomach cavity and also take samples of the lesions for testing. The result of the gastroscopy was mild inflammation of the stomach, but the doctor on duty carefully analyzed that only mild gastritis would not normally have such serious symptoms, could there be other diseases? At this point, the doctor further suggested that she do a barium meal test again. Mrs. Li wondered, after doing such an advanced gastroscopy, but also to do a barium meal ah? Is this doctor quite “water” ah? After the barium meal was done, the problem was finally discovered. In addition to gastritis, she also suffered from gastric prolapse and gastrointestinal dysplasia, and a small pouch-like diverticulum appeared in her duodenum, which caused her stomach pain due to the weakened digestive capacity of her stomach after each meal. After the doctor gave anti-gastritis and gastric power treatment, she was finally cured. Advanced gastroscopy is not a substitute for the barium meal test that has been used for decades. The gastroscope is a lens attached to a fiber optic cable that is placed in the stomach from the mouth to observe the inner surface of the stomach, showing the surface mucosa very clearly, but not the hidden lesions under the mucosa, but not the overall morphology and function of the stomach. Barium meal examination is a simple and intuitive gastrointestinal examination method, which uses X-ray fluoroscopy to observe the digestive system from an external perspective, and can not only show the lesions of the mucosa on the inner surface of the stomach, but also clearly show the morphological structure of the stomach and intestines, and can also show the peristaltic emptying of the stomach and intestines. Therefore, it is a misconception that “with advanced gastroscopy, there is no need for barium meal”. The combination of barium meal and gastroscopy, one external and one internal, is more comprehensive and accurate in diagnosing some difficult gastric diseases.