What metaphors are used in Child of the Owl: Golden Mountain Chronicles: 1965 by Laurence Yep?

San Francisco is both a symbol and a metaphor for Chinese culture in America. San Francisco is where Casey lives with her father, Barney before he is hospitalized. There is a small section of San Francisco, known as Chinatown, where Paw-Paw lives, and where Casey learns about her cultural history.