1. In order to facilitate observing the shape of lumbar, the place of the L1 and L2 is uncovered. 2. L3, L4, L5 spinous process and sacrococcyx are the functional positions for puncturing. Clear marks on these parts facilitate to skills training, including lumbar anesthesia, epidural anesthesia and caudal anesthesia. 3. The exercise process can be operated in sitting position or lateral position.thrust into the vein.