Gastrosis is the illnesses with very high prevalence rate in modern society. According to a survey, four-fifths people have Gastrosis with different degrees. Many people is suffering from gastric cancer and a certain number of patients do not diagnose their disease until it become the late stage. Actually, symptoms of gastric cancer in early stage is not that obvious. So it needs some diagnostics kits like stool test kit to help do the diagnosis of gastric cancer.To do a stool test of fecal occult blood (FOB) is an effective way to figure out the condition of stomach.