Neck diseases, such as neck injuries and thyroid diseases. Breast diseases, such as breast cancer. Peripheral vascular diseases, such as varicose veins of lower limbs. Abdominal wall diseases, such as inguinal hernia. Abdominal emergencies, such as trauma, peritonitis and gastrointestinal bleeding. Gastrointestinal diseases, such as gastric perforation, appendicitis, intestinal obstruction, gastric cancer, colon cancer, anorectal diseases, such as hemorrhoids, anal fistula, rectal cancer, etc. Diseases of liver, gallbladder, pancreas and spleen, such as liver cancer, cholecystitis, gallstones, pancreatitis, portal hypertension, splenomegaly, etc. Others such as congenital abdominal diseases and retroperitoneal tumors in children. In addition, general surgery is closely related to the basic knowledge of surgery, such as wound repair, burns, electric injuries, animal bites, surgical infections, tumors, shock, aseptic principle, blood transfusion, body fluid balance, enteral and parenteral nutrition, critical organ failure, ICU, transplantation, microscopic examination, reduction, body surface tumors and so on.