This discovery makes sense.
If prehistoric Kennewick Man, discovered in Washington state, was Caucasian it stands to reason that there would be other Caucasian remains found in the Asian heartland.
Kennewick Man died in Washington State, 9,300 years ago. He was Ainu of which there are still 10-50K still living in Japan. They have many Caucasian features. You may find this link interesting.
Also, there are many Chinese poems lamenting the green eyes of the Han Emperors. And...their 'magic-men' were noted for having red hair.