The document discusses the application of fieldbus technology in flash smelting at Jiangxi Copper Corporation's Guixi smelter, which is the largest in the world. It highlights the successful implementation of advanced control systems from Emerson and Yokogawa, reducing costs, improving efficiency, and enhancing reliability in operations. The adoption of this technology has allowed for decentralized control and centralized management, facilitating preventive maintenance and further applications in engineering projects.