Did China become ethnically Mongol or Manchurian in those 400 years? They're still Han. The plate tectonics part of this article is a stretch. But other than t

Did China become ethnically Mongol or Manchurian in those 400 years? They're still Han. The plate tectonics part of this article is a stretch. But other than that, this article seems well researched. Whether one agrees with it or not is decided by one's position on "geographic determinism".