《水经注·卷二十六》
又往北流过淳于县东面，潍水又往北流，左边与泣水汇合，往北流经平城亭西面，又转向东北流经密乡亭西面。
又北过淳于县东，潍水又北，左会汶水，北径平城亭西，又东北径密乡亭西。
It flows again north through the east of Junyu County and Weishui flows northward again, merges with Kuishui on the left, flows northward through the west of Pingchengting, and turns northeast again through the west of Mixianting.