《资治通鉴·唐纪·唐纪十九》
丰州司马唐休进言认为： 丰州依仗黄河为屏障，处于敌人的要害地带，自秦、汉以来，都设置郡县；土地适宜于耕种放牧。
丰州司马唐休璟上言，以为： 丰州阻河为固，居贼冲要，自秦、汉已来，列为郡县，土宜耕牧。
Fengzhou Sima Tang Xiujin stated in his petition: Fengzhou relies on the Yellow River for protection, which is a key strategic area for the enemy. Since the Qin and Han dynasties, counties have been established there. The land is suitable for farming and grazing.