We participated in the Dolphin Park activity at 3:30 p.m., and we scheduled a group of six dolphins to accompany us, explain and launch. Only when I started touching the dolphin's back, I saw a group of families coming out to explore. We wonder if the dolphin's sensitive parts have been attacked and exited for unknown reasons. The dolphin that interacts with us is a "boy" with only one line in the lower abdomen. If it is a "girl", it will have two more short lines. It is the place where the little dolphin drinks milk. A dolphin's head, especially its eyes, cannot be touched by its stomata. A dolphin's ear is a little bit outside. When interacting, although visitors do the same actions as trainers, in fact, dolphins only listen to trainers.