 A List the general condition of patients before and after TTT; found the location of the tumor, whether the same type? B The rates of EGC detection before and after the TTT? Is the rates of Gastric cancerGC detection increasing? CThe rates of EGC detection between the doctor accepted the TTT and not? D is the rates of EGC detection different among T1, T2, T3, T4 ? Is the rates of Gastric cancer detection increasing? F early cancer patients was found after TTT training, comparison the endoscopic diagnosis with Pathology, and pay attention to accuracy, sensitivity, false positive rate and false negative rate ME-NBI. And the reason analysis. 