What organization does Joy join in college and why does she end up in China in the book, Dreams of Joy?

In college, Joy joined the Chinese Students Democratic Christian Association, which the government believed was a communist cell. In the wake of Sam's death, all the family secrets tumbled out, overwhelming an already guilt-ridden Joy. In the middle of the night, Joy packed up her belongings and ran away to China in the hopes of finding her birth father and her true self.