《徐霞客游记·滇游日记四十四》
它北面是平缓的山冈向东延伸，而后连接到东山，此处海子实际上是青龙海子的源头。
其北则平冈东度，而属于东山，此海实青龙海子之源矣。
Its north is a gentle hill stretches eastward, and then connects to the east mountain. The lake here is actually the source of Qinglong Lake.