《宋书·志·卷三十七》
晋安帝设立。宋孝武帝孝建二年后，把僮阳晋安帝设立。并入长宁，绥宁晋安帝设立。
孝武孝建二年后，以僮阳并长宁，绥宁并上黄。
Set up by Emperor Jian'an of Jin Dynasty. After the second year of Emperor Xiao Wu of Song Dynasty, Tongyang was incorporated into Changning and Suining to establish Emperor Jian'an.