back when i was doing my human origins projects, i needed to create this evasive placeholder group called northeast asians that brought genetic continuity with the west to northern asia. it was a necessity, but largely ignored by the specialist literature because there wasn't any useful evidence of migration, or even a worthwhile mechanism. but the genes say it happened, so i erected it. i then derived a sino-tibetan clade as a hybrid population of "southeast asians", who otherwise became austronesians, and a siberian-like group that became native americans. so, this phantom population (which remains extant in siberia) actually got up and went to america, which is why nobody has traced it, only stopping in china on the way there, and being subsumed by the chinese population - but altering it dramatically. what that means is that the modern northern chinese population, as well as korean and japanese population, would actually have substantive northwest asian ancestry. well, that's what we know; what i'm doing in erecting this phantom population is provide a hypothesis for the movement.
i just came across some pictures of the offspring of a melanesian man and a white woman, and they do not look like either of their parents. they could both pass as chinese. i won't post them here.
while hardly any kind of evidence, it is at least consistent with the theory i developed, which is that the ethnogenesis of the modern chinese actually lies in this somewhat unique process of hybridization between west asian and southeast asian subtypes in multiple layers, but most prominently over a siberian-austronesian mix that was left as collateral in the movement of siberian peoples to the new world.
i'm going to focus, now. i've been sleeping all day...