Into the Land of the Black Lisu
The Nujiang Canyon, on Yunnan's western frontier, was until the 1930s a blank area on the map that not even Chinese troops dared to enter. In 1905 two British explorers made the first foray into this land of the Black Lisu.
Early 20th century murals at Mangzhong Temple near Menglian
Yunnan was not always China: indeed not so long ago large parts of Yunnan were only nominally part of the empire. To make Yunnan, outside the main Han cities, a Chinese province required significant effort. Here Giersch's study on Yunnan's hinterland makes an interesting if academic read.
A number of Chinese historic texts covering life and politics in Yunnan have survived over the centuries. I have translated a few of them.