Liu Fei Fei in short was Liu Hui Ying's elder cousin even though she was at the same age as Liu Hui Ying because her father was Prime Minister Liu who was Liu Hui Ying's father's older brother, Liu Fei Fei was used to bullying Liu Hui Ying with the help of her position being superior.
And even Liu Hui Ying who was scared of her eldest uncle would let Liu Fei Fei bully her behind everyone's back, after all, she was not close to her father after the loss of her mother.
Every time Liu Hui Ying saw Liu Fei Fei, she would lower her head and let her do what she wanted and even after getting bullied to the point where her hair was scattered and ripped off her scalp even then she would not say anything to her father who would ask her with whom she fought with, in fact, it was better to say that she would snap at her father for being too nosy.