Rare earths are known as industrial "gold", "industrial vitamins" and "mother of new materials". Rare earth is not a kind of soil, but a general term for lanthanide elements, scandium and yttrium elements in the periodic table of chemical elements. Its most important function is to significantly improve the quality and performance of other products, forming various new materials with different characteristics and other Material. Therefore, as an indispensable and important raw material for many major weapon systems and high-precision industries, it is a globally scarce and non-renewable important strategic resource. China is one of the countries with the most abundant rare earths. China has many strategic resources such as iron ore, but it is very rich in rare earth resources. At present, resources are the precious wealth of a country, and also an important weapon for developing countries to safeguard their own rights and fight against major powers.

Rare earth neodymium, chemical symbol Nd, atomic number is 60, one of the lanthanide elements, the element is silver-white metal, it is one of the most active rare earth metals, the melting point is 1024°C, the density is 7.004g/cm³, and it is paramagnetic. It can quickly darken in air and generate oxides. Neodymium plays an important role in the rare earth field and dominates the rare earth market.