How old is your son? If he is a high school student or a college student, a privelege to choose his nationality means something, because his personality has mostly built up. If he is a young kid, the culture gap may erode his self-esteem. When he grows up, he may experience identity misdeem problem. I am not a psychologist, but I have met too many ABC children. They suffer from ethnicity and identity perplexity.
Chinese parents are too ready to set up their children's life and career paths. They believe that they are doing some "good" to their children. However, they never come to their off-springs to ask a simple question: what are you really looking forward?