Manufacturing of strategic materials, sophisticated weapons, etc. Non-ferrous metals refer to all metals except iron, chromium and manganese, and are the basic materials for national economic development. Their main uses are basic materials and important strategic materials that are indispensable for the national economy, people's daily life and the scientific and technological development of national defense industry. The manufacture of cutting-edge weapons such as airplanes, missiles, rockets and satellites, submarines, etc. requires a color foundation. Non-ferrous metals have become an important material basis for determining the development of a country's economy, science and technology, and national defense construction. It is an important strategic resource to enhance the country's comprehensive strength and safeguard national security.