Features：
1. Lifelike appearance, realistic texture
2. Clear anatomical landmarks: shoulder blade, rib, intercostal space, spinous process, etc...
3. Percussion on the back of both sides to determine the puncture site
4. Puncture site: can be performed on both sides of the shoulder blade inferior line, midaxillary line and posterior axillary line
5. Silumated pleural effusion can be extracted while correct operation
6. Electronic monitoring: wrong puncture site will have voice prompt
