The khushtar (Chinese: 胡西它尔; Uyghur: خۇشتار, Хуштар, also hushtar or hustar) is a bowed lute from the Uyghur Region, Western China. It has four strings in four courses and is tuned G, D, A, E.

Sometimes the Khushtar also has sympathetic strings. It is most common among the Uyghur peoples in the Xinjiang province of Western China, especially Urumqi.
https://en.wikipedia.org/wiki/Khushtar