The four stages of development from gastritis to gastric cancer are as follows: 1. superficial gastritis, which is a mild damage to the mucosa. if the cause is controlled in time, superficial gastritis can be corrected in time and the damage to the mucosa is reversible. 2. atrophic gastritis, which is a thinning of the gastric mucosa at this stage, is usually irreversible and the gastric mucosa cannot be fully restored to normal after timely elimination of the causative factors. 3. intestinal epithelial hyperplasia, which is simply In other words, the gastric mucosa has become as thin as the intestinal mucosa. If the treatment is not timely controlled, it will further evolve into atypical hyperplasia, which is more irreversible at this stage.4. Atypical hyperplasia, which usually includes mild atypical hyperplasia, moderate atypical hyperplasia and severe atypical hyperplasia. Severe atypical hyperplasia is also called early cancer or precancerous lesion, which usually cannot be completely distinguished from early gastric cancer.