The world of mortals is, after all, just a dream. Ask who in the world can break through the world of mortals? Even if a person becomes a monk, there are still six roots that are not purified. This shows that...
She mistakenly went back a thousand years, maybe she was destined to be with him, she gradually fell in love with him, maybe they were destined to be together, but she finally found out that she was just a substitute! She wanted to leave, but who knew that the world was so big that she would meet him again? Who knows that lovers will eventually get married? When she understood, it was the moment of separation between life and death. Perhaps, all this was just a dream, and when the time came, she met him again...