Analysis of the main characters of "Love in a Fallen City" by Eileen Chang?

Love in a Fallen City has a beautiful name, but it is about an unattractive love, the poetry flowing on the surface of the title is washed away by the calculations and reality between the hero and heroine in the story.

What Bai Liusu wants is nothing more than "financial security" and a long-term meal ticket, while Fan Liuyuan's plan is to make Liusu a mistress rather than a wife.