《资治通鉴·汉纪·汉纪三十六》
光武帝下诏，听任南单于进入云中郡居住。汉朝自此设置使匈奴中郎将，领军护卫。
诏听南单于入居云中，始置使匈奴中郎将，将兵卫护之。
Emperor Guangwu issued an imperial edict, allowing the Southern Chanyu to settle in the Yunzhong prefecture. The Han Dynasty then established the position of Zhonglang general of the Huns, leading an army to protect him.