The title given by the short and fat man is not a concept in the book at all. He directly posed a very difficult pseudo-real question for Gu Peng, No. 45, to answer.

"Female patient, 65 years old, has discharged mucus, pus and blood stool for half a year for unknown reasons, which is sparse and shapeless. Four to six times a day, not much. Abdominal distension has been felt in the past 2 to 3 days. Physical examination: T, 37.8 C, BP95/58mmHg, P92 times/min, thin face, abdominal bulge, no abdominal muscle tension, tenderness but no rebound pain, palpable left lower abdomen and a fixed hard mass, hypersonic bowel, mobile...