Yiyang is an enterprise specializing in optical element processing, sales and service. Mainly engaged in processing and coating of various crystal materials, mainly infrared optical materials, including ZnSe, ZnS, Ge, Si, chalcogenide glass, etc. The products are mainly used in various power lasers, medical beauty, infrared thermal imaging of household cars, urban security and other industries, and are exported to Europe, the United States, Japan and other overseas markets. At the same time, they are agents for the sale of foreign ZnSe, ZnS, chalcogenide glass, calcium fluoride and other infrared crystal materials.