《水经注·卷二十》
建安水又往东北流，有难尾谷水，又往东北流，有太谷水，又往北流，有小祁山水，这几条水都发源于东溪，带着跳跃的水波，往西注入建安水。
建安水又东北，有雉尾谷水，又东北，有大谷水，又北，有小祁山水，并出东溪，扬波西注。
Jian'an River flows northeast again. There is Nanweiguxia River. Then it flows northeast again and there is Taiguxia River. Then it flows north and there is Xiaoqishan River. These rivers all originate from Dongxi River, bringing leaping waves and flowing west into Jian'an River.