The tungsten element of a tungsten plate is a rare metal. A metal that is usually found in nature in small or scattered quantities. Tungsten is a widely distributed element found in almost all types of rocks but in low amounts. 

The content of tungsten in the crust is 0.001%, and the average content in granite is 1.5×10-6, which makes it very difficult to extract and can only be separated and extracted by organic solvent extraction and ion exchange. With the progress of science and technology and the development of metallurgy process, equipment, analysis and detection technology, as well as the expansion of the production scale of rare metals, the purity, performance and variety of tungsten have been continuously improved, thus expanding the application field of tungsten. China is rich in tungsten resources, and the output and export of tungsten are the largest in the world.