Stunner

Song Zhi Wei's father had an affair when she was young. Her mother's health deteriorated day by day and she suffered from depression. She eventually committed suicide. Later on her father's mistress, Zhong Nian, became pregnant. She took advantage of the child to get ahead and excluded Song Zhi Wei. She used some of Song Zhi Wei's mother's things to stimulate her and started a dispute. During which, Zhong Nian deliberately fell down the stairs and falsely accused Song Zhi Wei of pushing her. This incident angered her father, who sent her abroad to study.
Eight years later, Song Zhi Wei came back and deliberately approached her uncle-in-law for revenge. They already had an intersection five years earlier. Chu Han Ting knew that she was using him, but he was willing to be her pawn.
(Source: Chinese = Weibo || Translation = Google Translate)