《后汉书·列传·皇甫张段列传》
朝廷批准了他的请求，以张奂代为度辽将军，皇甫规为使匈奴中郎将，后来张奂升大司农，皇甫规再次代为度辽将军。
朝廷从之，以奂代为度辽将军，规为使匈奴中郎将。及奂迁大司农，规复代为度辽将军。
The court approved his request, with Zhang Huan replacing him as General of Deploying Across the Liao (River), and Huangfu Gui as Prefect General of Huns, and later Zhang Huan was promoted to Grand Administrator of the Masses, and Huangfu Gui again took over as General of Deploying Across the Liao (River).