《徐霞客游记·滇游日记四十三》
又向东顺大道上走，有时陡峻有时平坦，全是俯瞰着南面的壑谷行，五里，便越过岭脊。
又东随大道上，或峻或平，皆瞰南壑行，五里，乃逾岭脊。
They continued east along the main road, sometimes steep and sometimes flat, all the while looking down on the valley to the south. After five li, they crossed the mountain ridge.