Yao Cuilan was the elder twin sister of Yao Cuirer. She had already married and had children before her sister wed. She is revealed to be ruthlessly cunning, willing to eliminate her own younger sister, her ex-husband's family, and her children to achieve her goals. She murdered Yao Cuirer, covered up the body with injuries suggesting it was tied up, and took her sister's place to marry into a wealthy family in Beijing. Decades have passed and traces have been erased, making it difficult to expose her. She is female.
