An Observational Study for Gastric Cancer in Carriers of High Risk Helicobacter Pylori

Inclusion Criteria : 1. Age ≥ 40 years, gender is not limited. 2. Able and willing to provide informed consent and willing to undergo baseline and follow-up examinations. Exclusion Criteria: 1. A history of diagnosed gastric cancer or other malignant tumors of the digestive tract. 2. Comorbid severe underlying conditions (e.g., severe cardiopulmonary insufficiency, liver or renal failure, etc.) that are likely to result in a short life expectancy or render long-term follow-up impractical. 3. Severe mental illness or incapacity to participate in the study due to lack of civil behavior. 4. Pregnant or breastfeeding women. 5. Other conditions that the investigator deems inappropriate for participation in the study.