The girl dare not accept the dream created by the reality of Nanhe's death.

First of all, Betelgeuse knew from the beginning that Nanhe died to save her. In order to keep Nanhe alive, Betelgeuse created a dream, a dream that Nanhe was still alive, which was also a dream created by the girl who dared not accept the reality that Nanhe was dead. At first, the girl jumped into the sea completely by suicide, because she had lost the hope of finding her mother in reality, so she lost the hope of living. At first, seeing sea elves was also an extreme manifestation of depression.

In order to create a dream, the girl forgot the fact that Nanhe was dead. Instead, she didn't want to find her mother in reality, but wanted to find the opposite of her mother in her dream. All the fantasies of the girl in the dream are contrary to reality, such as the sea otter in the dream giving the candy in her hand to the little girl. In real life, the sea otter is the younger brother who has been fighting for his family status. The frustrated ghost in the dream is dangerous, but in reality it symbolizes that girls miss their mother's red coat. When she was thrown to the island by the South River in her dream, the closer she was to the center of the island, the farther she was from the core of the dream, until a pair of mother and daughter who could not change fish appeared in reality. At this time, she knew that the dream was about to wake up, so she deliberately summoned the frustrated ghost to let Nanhe save her, which avoided waking up.

But in the end, Nanhe finally died in the eye of the deep sea, close to reality, so the dream will wake up. For the girl, she finally accepted the dialogue between reality and Nanhe. The South River here is not the real South River, but the little girl's lifelong desire. The positive Nanhe is trying to persuade her, so the girl's spiritual salvation is completely self-salvation, while in reality Nanhe only saved the little girl's life, and both of them worked hard for one life.