Fortunately China is bent on preserving Han blood. That severely limits their genetic diversity. At the very least that will buy us time. America's genetic diversity is a great advantage. But presently, it seems to me, that it is only the Jewish culture taking advantage of it through a subtle promotion of positive eugenics via selective marriage.
I should probably note for the record that the source of the article kindly submitted here is not a reliable source on any controversial topic, and then move on.