The larger map above, also from Wikipedia, shows the Tibetan Plateau in greater details. Its an important source for a number of important Asian rivers, the Mekong River being just one of the many.
There are a number of endangered species of animals in the upper Mekong River (Yunnan) before reaching the Tibetan plateau. Some are the Yunnan Golden Monkey (above), the Red Panda and the Asiatic Black Bear to name a few.
The program also dealt with fishing with cormorants in one of the alpine lakes. To learn more about this and other aspects of the Mekong River you can start your research by Googling. This is a fascinating planet, don't you think, despite all the harm we've done to it in recent times? - V