Edward Wong, Chinese Modernization Finds Path to Isolation; Local officials want to sell tourism to the outside world. New York Times, Apr 25, 2016.
two consecutive paragraphs:
"Dulong River Valley 独龙江峡谷. It is home to almost all of the country's 7,000 ethnic Dulong 独龙族人, or Drung, one of the smallest of the 56 official national ethnic groups. The lifeline of this northwest corner of Yunnan Province is the Dulong River 独龙江, which begins on the Tibetan plateau and flows through this valley into Myanmar, where it merges into the Irrawaddy. In Yunnan, the river runs 90 kilometers, or 56 miles.
"The Gaoligong mountain range 高黎贡山 has kept the Dulong valley secluded, separating it from the wider valley of the Nu River, where a mosaic of ethnic groups live.
Note:
(a) Dulong River
(i) Tracing Dulong River to Irrawaddy River:
(c) Three Parallel Rivers of Yunnan Protected Areas 云南三江并流 https://en.wikipedia.org/wiki/Th ... nan_Protected_Areas
("upper reaches of the Yangtze (Jinsha), Lancang (Mekong) and Nujiang (Salween) rivers [in the order from east to west], in the Yunnanese section of the Hengduan Mountains" whose map show Dulong River west of Nu/Salween River)