Digestive tract diseases are one of the most important diseases affecting human health. According to epidemiological surveys: digestive tract diseases take the first place. The most common digestive tract diseases are inflammation, ulcers, and tumors. Some inflammatory diseases and ulcers can be transformed into tumors. According to domestic and foreign data, gastrointestinal malignant tumors take the third place among all malignant tumors, and there is a trend of youthfulness, with the incidence of youthful gastric cancer and youthful colorectal cancer increasing year by year. Fifty to sixty years ago, the incidence of gastrointestinal tumors was very high in some countries, such as the United States, Japan, Norway, Finland, etc. Due to the popularization of gastroscopy, 40%-70% of early gastrointestinal tumors can be removed and cured under gastroscopy, which can reduce the mortality rate of gastrointestinal tumor patients by more than half. Gastroscopy, the clinical gold standard Gastroscopy is the best method to diagnose gastrointestinal diseases and is the clinical gold standard, medical experts call it the protector of gastrointestinal tract. The endoscopist has a pair of “trained eyes” and can observe the gastrointestinal tract through the gastroscope to achieve an unobstructed view, and acutely detect small lesions in the gastric mucosa >5mm, such as small elevations, small depressions, small “pox”-like changes, small color Sometimes simple gastrointestinal mucosal staining can be performed to detect abnormalities in the coloring of the gastrointestinal mucosa in time, and then biopsy can be performed to determine the nature of the lesion and provide a basis for clinical diagnosis and treatment. Some small lesions can be removed microscopically without the need for cesarean surgery. Who needs regular gastroscopy? Who should be alert to the occurrence of gastric cancer and take the initiative to go for gastroscopy? At present, it is widely recognized that if any of the following groups of people have one of these conditions, it is recommended to have gastroscopy once a year as early as possible: 1. Patients with stomach cancer or other gastrointestinal cancers in the family. 2.The original acid reflux and heartburn, but now the symptoms suddenly disappear. 3.If there is difficulty in swallowing, chest pain after swallowing, epigastric pain, hunger and distension, ergas, acid reflux, dyspepsia, nausea, vomiting blood or abdominal pain, diarrhea (more than 2 weeks), difficulty in bowel movement or lump. Any patient with the above symptoms should pay attention to whether there is already a problem with the digestive tract. 4.Anyone over 30 years of age with lower gastrointestinal symptoms such as blood in the stool and irregular bowel movements. 5, unexplained vomiting of blood-like coffee-colored material or tarry stools, weight loss. 6.H. pylori infection. 7.History of pelvic radiotherapy and cholecystectomy. 8.Past history of gastric disease, especially chronic gastrointestinal ulcer, polyps, atrophic gastritis. 9.Born in a high incidence area of gastric cancer or have lived in a high incidence area for a long time. 10.I have suffered from other tumors.