Mongolia's copper mine starts underground production

ULAN BATOR, March 13 (Xinhua) -- The underground production of the Oyu Tolgoi copper-gold mining project in the southern Mongolian province of Umnugovi started Monday.

"The Oyu Tolgoi underground project is very important for the implementation of 'Vision 2050,' which is the Mongolian government's long-term development policy. Thanks to the development of the underground mining, our country's goal or dream of br