Yuang Yang (Yueng Yang), Wenshan Co., Wenshan Autonomous Prefecture, Yunnan Province, China

Yuang Yang is a small town in Yunnan Province where mineral dealers frequently offer Vietnamese specimens.

For instance, this place was given as the locality for a find of emerald-green fluor-cannilloites (?). These specimens actually come from Luc Yen http://www.mindat.org/loc-6947.html), in the bordering Yenbai Province of Vietnam.

Ref: Eugeni Bareche (2007) An Phu, Luc Yen, Vietnam. Revista de Minerales (Barcelona), 2007/2, 26-29.

Note: "Yueng Yang" is a mis-nomer frequently found on german websites.