Or, the Sunday article about the paper sons, is very interesting. I can't imagine going through life with the fear of discovering that my parents were really not my parents, etc.
Beautifully described, Ching Ching Ni tells us about the paper son phenomenon and how difficult for families to trace roots, or really know much about their family trees because of the immigration of Chinese primarily during the years between 1910 and 1940.
According to the article, 80-90% of Chinese immigrants from that time period were paper sons, After the SF earthquake, Chinese in America were free to travel to China and basically began to bring back others, who were not necessariily their own family, creating the paper son label.