《徐霞客游记·滇游日记十二》
原来蟆螂川往北流，辟出很大的山坞，富民县治位于坞西坡下，其北面有分支山脉转向东延伸，从而阻碍了蝗螂川往下流。去武定府的路，就顺着分支山脉越过山坳往北走，川流则绕着分支山脉往东北流去。
盖川流北向，辟为大坞，县治当西坡之下，其北有余支掉臂而东，以障下流，武定之路，则从此臂逾坳北去，川流则湾此臂而东北下焉。
Originally, Huángláng Chuān flowed north, creating a large mountain gully. The county seat of Fumin is located at the foot of the western slope of the gully, with a branch mountain range extending eastward from its north side, blocking the downstream flow of Huángláng Chuān. The road to Wuding Prefecture follows the branch mountain range and crosses the mountain pass to the north, while the river flows northeast around the branch mountain range.