The discovery in Jiangxi province of China (see map below,) purports to have dated the pottery to 20,000 years ago with radio-carbon techniques.
From James Churchward's 1931 "Children of Mu" page 227:
THE TERTIARY UIGHUR EMPIRE. - When I say the
Uighur Empire of the Tertiary Era, I mean the Uighur
Empire of 20,000 years ago-before the Magnetic Cata-
clysm which was the Biblical "Flood," before the mythi-
cal geological "Glacial Period," and before the time when
the mountains were raised.
So, combined with the map he provided (see below,) these shards of pottery could be proof that the Great Uighur Empire did exist. Other discoveries in the cave and surrounding area could help solidify the claim. We have to wait until all the evidence is provided.
There is a page on the My-Mu.com website devoted entirely to the Great Uighur Empire and a mailing list for discussion. Please visit my-mu.com/gue to read more information about the Great Uighur Empire and sign up for the mailing list. It is low volume and new information is always welcome.
Have a great day,
Jack Churchward