Hybrids are genetically superior generally. That's the science of it, and the top and bottom of it, and the beauty of it.That is not just "racism" of the kind generally equated - quite wrongly, in my view - with "racial prejudice", but something altogether much nastier: the assumption of a mixed-race MASTER RACE - a complete, but equally vile, inversion of the Nazi notion of a German master race.
This notion of a mixed-race master race is, of course, being promoted vigorously, but implicitly, by the "liberal fascist" state (see Jonah Goldberg), with its self-serving ideology of "colourblindness", of indifference to ethnic different, and of "race doesn't matter", i.e. is of no social or political importance, except to evil "racists".
It will be interesting to see whether the Chinese state attempts to impose the same ideology. I doubt it, some how, since it would surely bring about its own rapid demise. Because in reality, when not suppressed, people are not "colourblind", i.e. indifferent to ethnic difference, and race DOES matter, because of its role in determining an individual's sense of personal and group identity, thereby making it of great social and political importance.
It is an importance which the STATE currently refuses to acknowledge, suppressing it instead (very effectively, by condemning it as evil "racism"), just as it originally suppressed tribal identity and loyalties amongst racially indistinguishable peoples, in order to claim them for itself.
The state got away with the deception of covering the - essentially, though perverted, Darwinian - power structures of statehood with the stolen mantle of nationhood, when racial and ethnic differences were minimal, but won't be able keep up the pretence for much longer, now that they are so much larger - especially if China faces up to the social and political significance of race.