What did white deer do in dragonwings?

In "Dragonwings" by Laurence Yep, White Deer is a significant character who represents the spirit and resilience of the Chinese immigrant community. She is the mother of the protagonist, Moon Shadow, and embodies traditional values while also navigating the challenges of their new life in America. White Deer plays a crucial role in supporting her family's dreams, particularly their aspirations related to flight and the aviation business that Moon Shadow and his father pursue. Her character highlights the themes of family, cultural identity, and the immigrant experience.