In 48 AD, Xiongnu was separated into Northern Xiongnu and Southern Xiongnu, this territory was ruled by King Huyan (呼衍王) whom swore allegiance to the Northern Xiongnu.
In 48 AD, Xiongnu was divided into Northern Xiongnu and Southern Xiongnu, with King Huyan (呼衍王) ruling the territory that was under his control.