宏达股份：公司目前主营业务为磷化工和有色金属锌冶炼

Group 1 - The core business of the company is focused on phosphorus chemicals and non-ferrous metal zinc smelting, with main products including zinc ingots, zinc alloys, phosphate series products, and compound fertilizers [1] - The company holds a 30% stake in Tibet Hongda Duolong Mining Co., Ltd., which currently possesses exploration rights for the Duolong Copper Mine and the Dubuzaxi Copper Mine [1] - Tibet Hongda Duolong Mining Co., Ltd. is actively advancing the "exploration to production" transition and the preliminary preparations for the development of the Duolong Copper Mine, aiming to convert high-quality resources into actual benefits as soon as possible [1]