[SMM Analysis: Copper Cathode Production in Full Swing Accelerates Copper Concentrate Inventory Depletion] With the increase in China's copper cathode capacity and the rise in production targets at various smelters, the inventory of copper concentrates, the primary raw material for copper cathode, has seen accelerated depletion. Although copper concentrate port inventory cannot fully represent the supply-demand balance of copper concentrates in China, SMM's data shows that the copper concentrate inventory at nine major ports in China dropped from a peak of 1.31 million mt (ore) at the end of last year to 610,000 mt (ore) by early March 2025. This represents a reduction of more than half within less than one quarter, a remarkable pace. Corroborating this is the record-high monthly production of copper cathode in China, as reported by SMM. Meanwhile, the smelting volume of secondary copper, another raw material for copper cathode, has not seen a corresponding increase. According to SMM, the monthly smelting volume of secondary copper is estimated to be around 160,000-170,000 mt (metal content). Furthermore, the implementation of domestic reverse invoicing policies and concerns over the impact of the China-US trade war on imported secondary copper supply have both exerted pressure on the supply side of secondary copper domestically and overseas.