Gold is a simple form of chemical element gold (chemical element symbol Au), which is a soft, golden yellow and corrosion-resistant precious metal.
Gold is one of the rarest, most precious and most valuable metals. Generally speaking, the gold in the world is in ounces. In ancient China, gold was measured in ounces, which was a very important metal.
It is not only a special currency for reserve and investment, but also an important material for jewelry industry, electronics industry, modern communication and aerospace industry.