锌业股份：公司属有色冶炼企业，目前无自有矿山

Group 1 - The company is primarily engaged in non-ferrous metal smelting, with main products including zinc, copper, and lead, and by-products such as sulfuric acid, gold, silver, and indium [2] - The company does not own any mining operations [2] - The company has plans for future developments, although specific details were not provided in the response [2]