“該礦床規模大,品位高,...,預估潛在經濟價值 2000 多億元。” - No, 品位 Not 高. Average 金礦品位 is 5 克/噸 while its 平均品位 is 4.26 克 / 噸, but very very large scale (large 金礦 is more than 5 噸金金屬量, while it's 新增金金屬量近 200 噸). The location is good but too deep, hopefully it's a good deal.