Features：
1. Life like, clear anatomical structure, include: head, neck, chest, real size lungs and stomach
2. Transparent abdominal wall, clear observation of internal organs
3. Oral/nasal cavity intubation
① Inserting to trachea, air feeding, lungs will be inflated
② Inserting to esophagus, air feeding, stomach will be inflated
4. Nasal feeding：When the gastric tube is inserted at 45-55cm, the simulated gastric juice can be drawn out
5. Gastric lavage:practice through oral/nasal cavity, stomach capacity up to 500ml
