Let me start by saying that I watched the drama before watching the movie.
After watching the movie everything felt really fast phased but that's pretty normal since its a movie and it can't be that long. Although the drama was way more detailed, I have to say that the movie was really great. Angelbaby portrayal of weiwei was really good and in a way I liked this version of weiwei better than in the drama. Now xiao nai well we all got to admit that yang yang was perfect for that role but Jing bo ran also did an excellent job playing the role of xiao nai.

Overall the movie was really great although if you haven't seen the drama or read the novel you might feel lost at times, so I would recommend either watching the drama or reading the novel first.