From the end of the Western Jin (215 - 316) to the Northern Wei, five ethnic groups once founded their states in the North China. They were called by a joint name "Five Hus and Sixteen States".

Five Hus: means five ethnic groups that live in north china, namely Xiongnu, Xianbei, Qiang, Jie and Di.
Sixteen States: include Qianliang (Former Liang), Houliang (Latter Liang), Nanliang (Southern Liang), Xiliang (Western Liang), Beiliang (Northern Liang), Qianzhao (Former Zhao), Houzhao (Latter Zhao), Qianqin (Former Qin), Houqin (Latter Qin), Xiqin (Western Qin), Qianyan (Former Yan), Houyan (Latter Yan), Nanyan (Southern Yan), Beiyan (Northern Yan), Xia and Chenghan.