I heard that I became the villain Bai Yueguang after I died

Sang Nian accidentally climbed into the world of immortal cultivation and became a vicious female supporting role in the book with a miserable end. System: Your mission is to marry the male supporting role Xie Chenzhou, abuse him, humiliate him, and then be killed by him. Sang Nian: OK (waving a small whip) (hitting herself) (falling to the ground with a plop) System: (silence) (looking up at the sky) System: The mission has been changed, you have to capture him for me, and if you fail, you have to go to dig coal. Sang Nian: (smiles confidently) This is so easy, and then she was successfully killed by Xie Chenzhou. She thought she would be sent to the next world to dig coal, but when she opened her eyes again, she was reborn three hundred years later. The system was heavy: "The network card is a step late, you have a new mission." Sang Nian...