In chunk 4 how does the relationship between jing mei's mother and auntie lindo contribute to the conflict between jing mei and her mother in the story

In considering both of the fundamental characters, we can feel sympathy as perusers with both of their positions, and similarly, we can distinguish that the way they collaborate can be coldblooded and cutthroat. 
We are made to feel the two feels sorry for and disdain at Jing Mei's mom. We are given brief insights about her troublesome past in China and how she saw her coming to America as speaking to being some place where anybody could accomplish anything.