Validating the Safety and Effectiveness of ENDOANGEL Lower Gastrointestinal Endoscope Image Auxiliary Diagnostic Software

Inclusion Criteria: * 18 years old ≤ age ≤ 75 years old, male or female; * Subjects with colonoscopy diagnosis and screening needs; * Sign the Written Informed Consent Form; * With full capacity for civil conduct. Exclusion Criteria: * History of acute myocardial infarction (within 6 months), severe heart, liver, and renal insufficiency or mental disease; * Patients who are taking aspirin, warfarin, and other anticoagulants; * Patients with inflammatory bowel disease, or polyposis syndromes, or confirmed or highly suspected colon cancer; * History of colorectal surgery; * Patients with familial adenomatous polyposis; * Pregnant women (if the subject is a woman of reproductive age and cannot confirm whether she is pregnant, a pregnancy test is required); * Patients who are participating in clinical trials of other drugs or medical devices; * Patients who are not eligible to participate in this clinical trial in the opinion of the investigator.