1. Li Muzi is a smart and kind person: Li Muzi is portrayed as a smart and loyal character in the film. It is natural for her to trust and help others. She has deep trust in her relatives and friends, so she is willing to accept and believe the explanation about the iron cage under the sea.
2. Li Muzi lives in a remote place: The story in the movie takes place in a remote mining area, and the residents of this community are closely related, helping each other and relying on each other. Therefore, Li Muzi may think that strangers have no reason to cheat her, and she believes that people in this community will be honest with each other.
3. Special circumstances in extraordinary times: The story in the film happened after a large-scale natural disaster, and people are in the process of recovery and reconstruction. In this special period, people are more inclined to unity and trust, believing that everyone needs mutual help and support. Li Muzi may be moved by this situation and choose to believe the stranger's explanation.
Although Li Muzi has no doubt about the submarine cage, it is also a part of the plot of the film, which provides the possibility for the subsequent story development and suspense.