... Jiangxi Golden Dragon Mining Co., Ltd. Of Jiangxi, and the United States K Engineering Co., Ltd., It's from 2002, located in ... has its own mine, with the proven reserve of tungsten ore 500, 000 tons, with the production capacity of an annual ... 's a science and technology enterprise capable of tungsten mining, ore dressing, smelting, and milling, In addition, it and has the ...