1. The length and diameter of each section are consistent with the human body;

2. For the simulation of various endoscopes of biliary tract;

3. For device development and device display;

4. Customizable lesions or calculi;

5. Combined with digestive tract, such as pancreatic duct, duodenum, stomach, esophagus, etc., to form a complete endoscopic training model;

6. Can be manufactured as a hydrogel version for practice with ultrasound-guided puncture interventions.