Introduction to metal fossils: The "Beautiful Homeland" unit introduces the knowledge of the formation of rock minerals on the earth and the landform characteristics of Inner Mongolia from the four parts of the planet, minerals, geology and landforms; "Rich Mineral Deposits" tells the application of minerals , Inner Mongolia’s mineral resource advantages and exploration work; “Sustainable Development” demonstrates Inner Mongolia’s low-consumption, low-emission, and high-efficiency circular economy industrial chain and circular economy network through examples.