 In 605, Xueyantuo were attacked by the Western Türkic Chuluo Khagan.Consequently, they abandoned the Western Turks and established their own Kaganate under a leadership of Qibi tribe's Yağmurčin Bağa-Qağan, retaining the control and income from the Turfan segment of the Silk Road.Later, Xueynatuo leader Yshbara was installed as a lesser Kagan Yetir (yeti er "seven tribes").