As an "industrial vitamin", rare earth is essential for the science and technology industry

Rare earth refers to the 17 lanthanides and other similar elemental oxides in the periodic table. The 17 rare earth elements are usually divided into light rare earth and medium heavy rare earth, among which the light rare earth includes lanthanum, cerium, praseodymium, neodymium, etc. Heavy rare earths include gadolinium, terbium, dysprosium, holmium, etc. There are more than 250 rare earth minerals in nature, of which medium and heavy rare earth minerals are more valuable than light rare ea