赛恩斯：在铜、钼矿的加工中，主要的采、选、冶成本由主产品铜和钼承担

Group 1 - The core viewpoint is that the processing costs of copper and molybdenum mining are primarily borne by the main products, while rhenium, a valuable byproduct, has a low marginal recovery cost [2] - Higher rhenium grades in ore lead to better overall economic benefits from recovery, which helps reduce unit production costs [2]