What is the theme in Paradise of the Blind by Duong Thu Huong?

Hang’s Uncle Chinh is a communist who has devoted his life in service to the regime. He forces his sister to separate from her husband in order to make himself look better and to honor his beliefs. Later, he tries to force his sister to take a job as a secretary in a factory so his reputation will be bolstered. He asks his sister to travel to get money from the sale of their parents’ house so he can buy furniture for his new apartment. Later, when his sister visits, she notes how sickly his children look.