Gold is an earlier metal discovered and used by mankind. Because it is rare, special and precious, it has been regarded as the head of hardware since ancient times. It has the title of 'King of Metal' and enjoys a reputation unmatched by other golden houses. Its prominent status is almost eternal. It is precisely because gold has this 'noble' earth gold that was discovered and used by humans earlier. Because it is rare, special and precious, it has been regarded as the head of hardware since ancient times. It has the title of 'King of Metals' and enjoys other The incomparable reputation of Jinsha, its prominent status is almost eternal. It is precisely because of the status of this'noble' that gold has been a symbol of wealth and luxury for a period of time, and it has been used as financial reserves, currency, jewelry, etc. So far. The application of gold in the above-mentioned fields still occupies a major position. With the development of society, the economic status and application of gold are constantly changing. Its currency function is declining, and its application in industrial and high-tech fields is gradually expanding. The main needs and uses of gold are divided into three categories: 1. Used as an international reserve. This is determined by the currency commodity properties of gold. Due to the excellent characteristics of gold, gold has historically served as currency, such as value scale, circulation means, and storage. Means, means of payment and world currency. With the development of society and economy, gold has withdrawn from circulation. Since the 1970s, after the decoupling of gold from the U.S. dollar, the currency function of gold has also weakened, but it still maintains a certain currency function. At present In many countries, including major western countries, gold still occupies a very important position. 2. Used as jewelry decoration. Gorgeous gold jewelry has always been a symbol of a person's social status and wealth. 3. In industry, science and technology Application. Because gold has unique and perfect properties, this property is not possessed by any kind of metal. It has extremely high corrosion resistance stability; good electrical conductivity and thermal conductivity; gold nuclei have large The effective cross section for capturing neutrons; the ability to reflect infrared rays is close to 100%; it has various catalytic properties in gold alloys; gold also has good manufacturability and can be easily processed into ultra-thin gold foil, micron gold wire and gold powder; gold It is easy to be plated on the surface of other metals, ceramics and glass. Under certain pressure, gold can be easily welded and forged; gold can be made into superconductors and organic gold. Because of its many beneficial properties, it has a wide range of reasons It is used in the most important modern high-tech industries, such as electronic technology, communication technology, aerospace technology, chemical technology, medical technology, etc. Previous article: 'The country of gold' South Africa Next article: What should be paid attention to when wearing gold jewelry