Gold (English: Gold) is a chemical element with chemical symbol Au (from Latin: Aurum) and atomic number 79. Pure gold is a kind of metal with bright luster, reddish yellow, soft texture, high density and ductility. It is a rarer, more precious and more valuable metal. It is not only a special currency for reserve and investment, but also an important material for jewelry industry, electronics industry, modern communication, aerospace industry and other departments.