驰宏锌锗(600497.SH)：没有开展白银加工贸易，主要通过自有和外购铅锌精矿伴生提取白银

Group 1 - The company has completed the feasibility study and technical scheme verification for the zinc smelting production system upgrade project at the Weize smelting subsidiary and the precious metal environmental upgrade project at Chihong Resource Comprehensive Utilization Co., Ltd [1] - The company is currently advancing the environmental impact assessment and land planning administrative procedures for these projects [1] - The company does not engage in silver processing trade, primarily extracting silver from self-owned and purchased lead-zinc concentrates [1] Group 2 - The company's main products are primarily sold in the domestic market [1]