Beijing Lear high temperature materials Co., Ltd. (securities code: 002392, securities referred to as "Beijing Lear") is mainly engaged in the development, production and sales of high temperature industrial refractories for iron and steel, nonferrous metals, petrochemical, building materials, etc., and undertakes the overall design, configuration, installation and construction, use and maintenance and technical services of refractories for high temperature thermal equipment Contract business. Beijing Lear is a pioneer in the overall contracting management mode of refractories used in domestic iron and steel industry. It is a large-scale overall contractor of refractories used in domestic iron and steel industry, and also one of the large-scale refractories manufacturers with the most complete product varieties and the most extensive overall contracting scope.