Noin-Ula burial site
Many immigrants lived in the Xiongnu pasturelands, but at first they did not mix with the Xiongnu. To be a Xiongnu, one had to be a member of a clan, born of Xiongnu parents. The newcomers were well off, but were outsiders, and could marry only among themselves, not the Xiongnu. Only later did they intermix, increase in numbers, even created a state that existed from 318 to 350 AD.
Ancient history
The Huns left practically no written records. There is no record of what happened between the time they left Mongolian Plateau and arrived in Europe 150 years later. The last mention of the northern Xiongnu was their defeat by the Chinese in 151 at the lake of Barkol, after which they fled to the western steppe at Kangju (centered on the city of Turkistan in Kazakhstan). Chinese records between the 3rd and 4th centuries suggest that a small tribe called Yueban, remnants of Northern Xiongnu, was distributed about the steppe of Kazakhstan.