This narrative is a little like Jekyll and Hyde, because trauma and horror have brought about a new counterpart who is the inverse opposite of Mulberry's public personality. Mulberry's identity was constructed through her life in China, with her old traditional Chinese views, but fate has taken her and dropped her in America where a new personality needs to arise if she is to succeed. She calls the second personality Peach, and Peach starts to teach Mulberry about her untapped dark side.
The reason Peach represents Mulberry's dark side is because old Chinese culture was a status quo for Mulberry's point of view. To be taken out of that involves such a dramatic paradigm shift that Mulberry's identity literally doesn't apply to her social reality anymore. In America, her Chinese personality will get stomped by powerful people on their way to getting what they want.
So Mulberry analyzes why she doesn't feel like she can just get what she wants. That brings the reader to the issue of feminism. Why was Mulberry's social power and authority locked away in the shadow? Because in China, feminist issues apply, and her experience of America shows her what it looks like when women try to get what they want. She discovers through Peach that she is already a very powerful person, and has been the whole time. However, the cultural assumptions she was given through culture limited her ability to believe in herself. Feminism is the implied solution to this problem.
