The state of Weixu 危須 was located at the northern route of the Silk Road. Today, it is located on the banks of Lake Bosten 博斯騰湖 in the modern region of Heshuo 和碩, Xinjiang. Some historians identify the modern city of Quhui 曲惠 with the ancient capital of Weixu. The 700 inhabitans of Weixu were controlled by the Xiongnu 匈奴 before they became part of the Protectorate of the Western Territories (xiyu duhufu 西域都護府) of the Han empire 漢 (206 BCE-220 CE). During the Tang period 唐 (618-907) it was conquered by its mighty neighbour Yanqi 焉耆.