Smelting, mining, beneficiation, and processing of zinc and other non-ferrous, ferrous, and energy minerals, as well as sales of mineral products; Production, transportation, and sales of sulfuric acid, import and export trade business, mineral resource exploration and its information and technical services, accommodation and catering (limited to branch operations) business, waste heat and pressure power generation, and sales; Production, processing, and sales of gold and silver products. estate management; Sales and leasing of electromechanical equipment; Chemical product trade.
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Smelting, mining, beneficiation, and processing of zinc and other non-ferrous, ferrous, and energy minerals, as well as sales of mineral products; Production, transportation, and sales of sulfuric acid, import and export trade business, mineral resource exploration and its information and technical services, accommodation and catering (limited to branch operations) business, waste heat and pressure power generation, and sales; Production, processing, and sales of gold and silver products. estate management; Sales and leasing of electromechanical equipment; Chemical product trade.