The name of the novel you mentioned is Devil Sky Record. This was an ancient story about fake siblings. It told the story of the female lead, Bai Su, and her two brothers, Murong Yan and Murong Feng. Among them, Murong Yan and Murong Feng were twin brothers who liked the heroine, while the emperor was a villain. The whole story was full of plots and ups and downs of love and hatred, which was deeply loved by readers.