Forced to Date a Big Shot

Please what happens to her paternal grandma and her cousin 

What’s up with the thing forcing her to date ML or die? How does she overcome it and what happens next? 

Can you tell me why Chen Bai and Qin Shuang break up?
Also who throws Xue Xi into that orphanage? Does Xue family is her real familly? What about her maternal grandpa illness cause? I,m still on 201 but curious as hck. Sometimes I feel annoyed becase of how dense she is, treat Xiang Hai as good-for-nothing, aso annoyed by the fact that Xiang Hai kept silence.