 Uyghur nationalist historians such as Turghun Almas claim that Uyghurs were distinct and independent from Chinese for 6000 years, and that all non-Uyghur peoples are non-indigenous immigrants to Xinjiang.This constructed history was so successful, that China ceased publishing Uyghur historiography in 1991.Chinese historians state that the region was 'multicultural' since ancient times, refuting Uyghur nationalist claims by pointing out the 2,000-year history of Han settlement in Xinjiang, documenting the history of Mongol, Kazakh, Uzbek, Manchu, Hui, Xibo indigenes in Xinjiang, and by emphasizing the relatively late "westward migration" of the Huigu (equated with "Uyghur" by the PRC government) people from Mongolia the 9th century.