1. Full anatomical structure, including esophagus, cardia, gastral cavity, pylorus, superior part of duodenum, descending part of duodenum, horizontal part of duodenum and ascending part of duodenum, etc.
2. Gastroscopic images are clear, accurate and highly realistic.
3. Offer multiple lesion of common gastrointestinal tract.
4. Available exercise on instrumental operation such as esophagoscope.
5. Available exercise on ERCP operation.