Sinkiang
From Urantia Wiki, the encyclopedia of The Urantia Book
The Andite culture, dominant in 15,000 B.C., spread new advances through Eurasia and North Africa from Mesopotamia to Sinkiang, blending with the Andite-yellow inhabitants and contributing to the improvement of the northern division of the yellow race in China. (78:5.2,6) 78:6.4
Aridity forced Andites to invent new methods in adapting to natural circumstances. 81:6.3
The Tarim River in Sinkiang was an ancient gateway for the Andite tribes infiltrating eastward into the northern lands of the yellow men and the highland regions of Tibet. 79:1.1-2
Twenty thousand years ago, migration from Sinkiang and Tibet to China brought superior blended peoples to strengthen primitive centers of culture along the Yellow River and Yangtze. 79:6.5
In the Urantia Book
> https://en.wikipedia.org/wiki/Xinjiang
Where it appears
Sinkiang is linked in 5 paragraphs of the text.