Zhangmu port has a distance of only 90 km. from Kathmandu, the capital city of Nepal. Therfore it is taken as the entrance for travelers to go in and out of Tibet. zhangmu ravine is not wide the Bochi flowing through it. When the raining season comes, caves are all watery and waterfall comes down from the cliffs. Because the mountain is huge, its ravine and the water drop are deep. The strong turbulent current hits the rock along the riverbed and produces a monotonous roaring with rhythms like an everlasting canyon sonata.

The best scenery in Zhangmu port is in the Qingzhangbu ravine. A folk proverb goes like that: “the four seasons coexist in a mountain, while the weathers change treacherously within a 10 mile sky”. This is a vivid description. One may have opportunity to see how the biological communities are interdependent. Though Shisha Pangma with its altitude of 8012 m. is not visible from here, but the snow-capped Qiaoba Bama peak can fall into people’s clear sight. Above 4000 m. altitude of the surrounding area are grown with low and small rice bitches as well as azaleas everywhere.