The whole story was written and directed by my sister, just to relieve my brother's mental illness.
Since killing his father, the younger brother has been in a trance. Although doctors can explain it with scientific theories, he cannot really convince himself. So my sister made up a story that the mirror has magic power and can kill people, to influence the younger brother's thoughts and make him think that he was not the murderer of his parents, but the murderer of the mirror. In this way, although the younger brother was taken away by the police in the end, he would be sent back because of his previous mental illness, which would at least give his younger brother a lot of spiritual comfort.
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