How did Yu Siyu die?

Yu Siyu fell off a cliff and died. According to the relevant information, Ding Huaiyuan cursed the fish, and the fish killed Yu Siyu. At this time, she pretended to attend the funeral and wanted to get money. Ding Gu kicked Yu Youwei out again and refused to let her attend the funeral. Yu Youwei had to kneel in the rain to see his mother off for the last time.