Following in the footsteps of many generations of immigrants, Chloe Chen, her parents and younger brother moved from Xinhui in the south China city of Jiangmen to San Francisco seeking a higher standard of life. They settled in a three-bedroom house in the Sunset on the advice of a relative who owned a home in the neighborhood. Making a living in The City, however, was more difficult than they expected. It took Chen’s father, who…