I actually think this film is trying to tell the audience about psychics, hoping that people who don't understand or don't believe can experience the world on the other side from more dimensions. Just discussing the plot and shooting techniques should not be what the film hopes to leave to the audience.
This film does not use psychics as a medium to tell stories of different timelines, but introduces the audience into a world where psychics exist and can watch life and death through several calm and slightly ingenious stories.
However, the topic of life and death is too grand. In order to allow people to think about or pay attention to such a field that cannot be explained with "rationality" for the time being, the film only touches the boundary of this Hongda field-spiritual Media, people who have experienced "death". Maybe the author/director has experienced such things, believes and wants more people to understand such a world, so he slowly tells the story in the film...
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