Just a year ago , hong kong-based cst mining group ltd. was china sci-tech holdings ltd. , a 15-person hong kong public company investing principally in real estate .

仅仅一年前，总部位于香港的中科矿业集团有限公司还是中国科技集团有限公司，只有15人，在香港公开上市，主要投资于地产行业。

Earlier this year , it bought two copper miners for $ 380 million -- one canadian , one australian -- hired western mining veterans to run them , raised $ 600 million through a private share placement and changed its name to cst .

今年稍早，它以3.8亿美元买入两家铜矿，一家位于加拿大，一家位于澳大利亚，聘用西方经验丰富的矿业人士来运营，通过非公开募股筹资6亿美元，并将名称改为中科矿业。