 1. a retrospective analysis of the ten young endoscopists painless gastroscopy examination from January 1, 2014 to December 31, 2014. According mainly to the endoscopic report and pateints History, quantity of gastroscope, gastric cancer and the early gastric cancer. In addition, for early gastric cancer patients, it was record,1 the patients name, 2gender, 3age, 4the location of the lesion- longitudinal upper, middle and lower,5 the location of the lesion -circumferential lessor curvature, Greater curvature, anterior wall, posterior wall,6 lesion size, 7conventional white-light imaging red, white, no change, 8EM-NBI VS type boundaries, microvascular pattern and microsurface pattern; dont do it, 9microscopy types uplift type, flat type, concave type or IIc IIIa or IIb, 10histological type differentiated and undifferentiated type and 11 pathological low grade neoplasia, high-level neoplasia etc.. For the treatment of ESD patients, further pathological results were recorded after ESD, including the pathology, edge and basal conditions. 