As I recall in reading about indo-european language history, the region where Tocharian was spoken was in the neighboring province to the west of Gansu. Tocharian being one of the more ancient indo-european languages.
I also remember something about some archeological finds of tall red haired men wearing tartan kilts near here. I believe there are also some blue eyed Chinese in this area as well today.
None of these things fit well with "official" Chinese history, however.
Yes. Tocharian A & B is an ancient and extinct language and is most closely related to ancient Celtic.
"I also remember something about some archeological finds of tall red haired men wearing tartan kilts near here. I believe there are also some blue eyed Chinese in this area as well today. "
Yes again. Below is a link to a post that covers this subject. Also, The Han emperors green eyes were lamented in many Chinese poems. And, their magic men were reported to have had red hair.
The Curse Of The Red-Headed Mummy
"None of these things fit well with "official" Chinese history, however."
Correct. I've spent some time studying this area and I'm about ready to declare that at one time there were more Caucasian types in China than there were Chinese as we know them today. I've already said that I would Be the least suprised if/when they open the tomb of the first emperor, a tall red-headed guy is found.