Graduate school Academy of Medical Sciences and Peking Union Medical College 100730;
Department of Gastroenterology-Japan Friendship Hospital 100029;
Department of General Surgery-Japan Friendship Hospital 100029;
Graduate school University China-Japan Friendship School of Clinical Medicine 100029;
miR-627-5p; miR-199a-5p; Colorectal neoplasm; Biomarker; Screening; Serum;