《明史·列传·卷一百四十七》
他还没有离开京城，开原就失守了，廷弼上书说： 辽左，是京城的肩背，河东，是辽镇的心腹，开原又是河东的根本。
未出京，开原失，廷弼上言： 辽左，京师肩背；河东，辽镇腹心；开原又河东根本。
He had not yet left the capital when Kaiyuan was captured. Tingbi memorialized the emperor: “Liaodong is the back of the capital. The east of the Yellow River is the heart of Liaoning Military Region. Kaiyuan is the root of the east of the Yellow River.”