Dungan (or) is a Sinitic language spoken primarily in the Chu Valley of southeastern Kazakhstan and northern Kyrgyzstan. It is the native language of the Dungan people, a Hui subgroup that fled Qing China in the 19th century. It evolved from the Central Plains Mandarin variety spoken in Gansu and Shaanxi. It is the only Sino-Tibetan language to be officially written in the Cyrillic script. In addition, the Dungan language contains loanwords and archaisms not found in other modern varieties of Mandarin.