《水经注·卷五》
河水又流经杨墟县老城东边，俗称阳城。河水又流经往平城东边，我怀疑县城曾迁到这里。
河水又径杨墟县之故城东，俗犹谓是城曰阳城矣。河水又径茌平城东，疑县徒也。
The river water also flows past the old city east of Yangxu County, commonly known as Yangcheng. The river water also flows past the east of Pingcheng, and I suspect the county seat had once been moved there.