This was covered in Mair's (large )book. It covers the bronze age right into the present age.
I have managed to connect the Hakka Chinese (who migrated all the way across China) to the Xiongnu group. The early (Caucasian) Xiongnu, Saka, Yuezhi and other groups were related to the same group as the 'red-headed mummy.' People today do not even realize how many Caucasian people were once in China. There are many poems in Chinese lamenting the green eyes of the Han Dynasty emperors.
Thanks, good stuff! As I started reading this it made me start thinking about possible relationships to the Japanese and the Huns, who I notice are covered further down the page. Will take me a while to absorb this. . .Also gets me thinking about the fact that Caucasian characterstics are found among certain American Indian tribes. What I'd really like to see is all this stuff we're discussing laid out in historical atlas form so a cross-cultural analysis over time can be done to identify patterns of migration and cultural exchange.
Sometimes spelled Hsiong-nu. Often associated with the Huns of European history. (The evidence allows but does not command the conclusion.)