South Africa is very rich in natural resources, especially in various mineral resources. There are many kinds of minerals that have been mined, among which the most famous is gold, and its output ranks first in the world. In the south of Pretoria, the capital of South Africa, there is a place called Johannesburg, which is the largest city in South Africa and the largest gold producing center in the world. It has the reputation of "the city of gold". There are dozens of gold mines in the area of 240 kilometers. On the top floor of the 50 storey Carlton center in Johannesburg, in the visiting corridor are displayed the gold ore mined from the gold mine, with schematic diagrams and large-scale color photos showing the process of gold mining and refining.
Over and over again on the TV screen, there are full sets of videos of gold mining, refining and casting. Gold is closely related to the life of the people of South Africa, and South Africa has naturally become the "land of gold".