《徐霞客游记·滇游日记四十三》
原来是山冈的左右，下坠的水分为三条沟，而后都是往北注入澜沧江了。
盖冈之左右，下坠之水分为三沟，而皆北注澜沧矣。
It turned out that the water falling from the left and right of the mountain ridge was divided into three ditches, and all of them flowed into the Lancang River to the north.