What kind of family relationship does & lt have children > have?

Liu Xing is the son of Hu Yitong and Liu Mei. After Hu Yitong and Liu Mei divorced, Liu Mei married Xia Donghai with her son Liu Xing. Light rain. Xiaoxue is the child of Xia Donghai and his ex-wife, Mary. She is a brother and sister (Xiaoxue grew up in America because her mother does business in America). Xiaoxue grew up beside Grandpa Jiu (Xia Donghai's father). The grandmother in the movie is Liu Mei's mother.