Fecal Immunochemical Test for Advanced Adenoma Detection in Colorectal Cancer Screening

Inclusion Criteria: * Adults 50-75 years old Exclusion Criteria: * People with history of intestinal surgery; * People with history of colorectal cancer; * People with history of inflammatory bowel disease, ischemic enteritis, vascular malformation of intestine or other disease resulting in intestinal tract bleeding; * People with symptoms including visible rectal bleeding, hematuria, severe and acute diarrhea; * Pregnancy, lactation or menstrual phase; * Severe congestive heart failure or other sever disease cause cannot tolerate colonoscopy.