"The Uyghur language and script contributed to the enrichment of civilizations of the other peoples in Central Asia. Compared to the Europeans of that time, the Uyghurs were far more advanced. Documents discovered in Uyghur Region prove that an Uyghur farmer could write down a contract, using legal terminology. How many European farmers could have done that at that period? This shows the extent of Uygur civilization of that time."