云南铜业：黄金为公司铜冶炼生产的副产品，上半年公司生产黄金12.19吨，同比上升98.86%

Group 1 - The core point of the article is that Yunnan Copper announced a significant increase in gold production for the first half of 2025, producing 12.19 tons, which represents a year-on-year increase of 98.86% [2] - Yunnan Copper clarified that gold is a byproduct of its copper smelting operations, and the production figure is accurate as per their disclosed semi-annual report for 2025 [2]