 In 1998, Chinese linguist Ji Xianlin published a translation and analysis of fragments of a Tocharian Maitreyasamiti-Nataka discovered in 1974 in Yanqi.Tocharian script probably died out after 840, when the Uyghurs were expelled from Mongolia by the Kyrgyz, retreating to the Tarim Basin.This theory is supported by the discovery of translations of Tocharian texts into Uyghur.