When Ji-li is nominated to be a Red Successor what does she learn from Du Hai about her grandfather and father?

Ji-li learns from Du Hai that her grandfather was a landlord before the Communist Party took power, and her father was a businessman who worked with foreigners. This information exposes her family's capitalist past, which goes against the Communist ideals. Ji-li realizes the impact this could have on her own future as a Red Successor.