“该矿床规模大,品位高,...,预估潜在经济价值 2000 多亿元。” - No, 品位 Not 高. Average 金矿品位 is 5 克/吨 while its 平均品位 is 4.26 克 / 吨, but very very large scale (large 金矿 is more than 5 吨金金属量, while it's 新增金金属量近 200 吨). The location is good but too deep, hopefully it's a good deal.