The Chuban tribes, or "Weak Huns", took advantage of Uar (Hephthalites) weakness and conquered Zhetysu, where they established the principality of Chuban (in Chinese literature commonly called Yueban), which existed until the 480s AD.
The Kidarite Xionites flourished under the Hephthalites, until something forced them to migrate from Khiva to Atil under Kandik in the mid-6th century.