Why did the elder sister bite the younger sister in The Great Woman?

I think my sister should have existed as an evil spirit at first. Eating my sister, as an expression of the extreme evil of life, is extremely evil and tenacious, just like the opposite of Jin Shengxian.

After Gemini was born, relatives kept dying, and the doctor who connected the twins committed suicide. My disabled sister grew up in a difficult and crazy environment, and her parents are gone. Grandma read a lonely confession poem every day to save her, lived in a remote place, moved a lot and had no friends.

In fact, my sister has also fallen into the quagmire of evil, and she hates and fears her sister who has brought her pain. But when she came of age at menarche, she chose kindness, kicked over poisonous food and gave her sister a sweater, which was equivalent to giving the beast something for one person. After menarche, my sister was treated as a human being. When she was well, she began to change, enlightened and turned away from evil, and dug up the lighter of fate! It is also a transformation between ideas.

Why does my sister appear in the form of evil? I think she appeared as a doom in Jin Shengxian's practice. After a hundred years of practice, if she gives up herself safely, she may become a Buddha. His greed and obsession with "eternal life" changed from prophecy to magic.

I remember when I was a child, I read a story about a fairy who came to Du Jie and was divided into two people, good and evil. They fought with each other for a long time, and finally accepted each other's fate face to face, and both of them came back from the dead. I guess Jin Shengxian may honestly do nothing and kill the mushroom.

Jin Shengzi's disciples are also evil. He sacrificed himself loyally with a noble heart and helped Jin Shengxian trick the juvenile delinquents into killing so many small mushrooms. Young criminals are tortured by guilt day and night, and still respond to the godfather's "Golden Sage" with the same evil and stupidity. But in the end, he finally realized that killing innocent little girls did not get justice.