贵研铂业：贵研黄金有限公司系公司全资子公司

Group 1 - The core viewpoint of the article is that Guiyan Platinum Industry (600459) has a wholly-owned subsidiary, Guiyan Gold Co., Ltd., which engages in various activities related to precious metals and their sales [1] - Guiyan Gold Co., Ltd. primarily focuses on the sales of gold and silver products, precious metal smelting, non-ferrous metal rolling processing, and manufacturing and sales of non-ferrous metal alloys [1] - As of the end of Q3 2025, the revenue of Guiyan Gold Co., Ltd. is approximately 300 million yuan, with a net profit of around 30 million yuan [1]