According to official website, WHO inquired about the road to health, and the results could be obtained within 2 hours after gastroscopy, which took several minutes. Patients must go to a regular hospital for gastroscopy. Gastroscopy is a medical examination method and also refers to the instruments used for this examination. With the help of a slender and soft tube, doctors can directly observe the lesions of esophagus, stomach and duodenum, especially for small lesions.