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.
Su Wu
In 100 BC, there was a short-lived détente between long-term adversaries the Han and the Xiongnu. One year earlier, in 101 BC, a new chanyu had come to power in Xiongnu, Chanyu Qiedihou (且鞮侯), who had expressed an interest in peace with the Han and who, as a goodwill gesture, had allowed some Han diplomats who had been detained by the Xiongnu to return to Han, along with gifts from the chanyu.