What is the main conflict in Family by Pa Chin?

Family is the story of an aristocratic Chinese family at the beginning of the 20th century. The Kao family lives in a well-appointed compound in the city of Chengtu and enjoys all the material and cultural benefits the city has to offer. Three brothers in the Kao family, Cheuh-hsin, Cheuh-min, and Cheuh-hui, are the main characters of the story. Cheuh-hsin, the oldest, is married and has a son, and the other two brothers are students in their late teenage years.