It is a metaphor that as long as two people work together, they can exert great power. Famous aphorism: Two people working together can cut through metal.

Introduction to gold:

Gold is the elemental form of the chemical element gold (Au). It is a soft, golden, corrosion-resistant precious metal. Gold is one of the rarest, most precious and highly valued metals. Internationally, gold is generally measured in ounces. In ancient China, "liang" was used as the unit of gold. It is a very important metal.

It is not only a special currency used for reserves and investment, but also an important material for the jewelry industry, electronics industry, modern communications, aerospace and aviation industries and other sectors. The chemical symbol of gold is Au, and its financial English code is XAU or GOLD. The name Au comes from a story about Aurora, the goddess of dawn in Roman mythology, which means shining dawn.

Properties of gold:

The color of gold is golden yellow with metallic luster and is difficult to decompose. Density 19.3g/cm3, melting point 1064.4℃; has good ductility, can be pressed into thin foil, has extremely high heat transfer and electrical conductivity, and the resistance of pure gold is 2.4P. Pure gold has good resistance to chemical corrosion and is the best electroplating material.

As a precious metal, gold has good physical properties. "Real gold is not afraid of fire" means that gold has high chemical stability and is not prone to chemical reactions with other substances. There is no need to worry about oxidation and discoloration. Even in the molten state, it will not oxidize and change color, and it will still sparkle after cooling. High density and heavy feel. Good toughness and ductility, good conductivity.

Pure gold has a bright yellow color, but the color changes greatly after being mixed with other metals. For example, gold-copper alloys are dark red, and silver-containing alloys are light yellow or off-white. Gold is easily ground into powder, which is why gold is dispersed in nature. Pure gold jewelry is also easily worn and reduced in weight. The atomic number of gold in Mendeleev's periodic table is 79, which means that the nucleus of gold contains 79 protons.

Protons have a positive charge. At the same time, because it complies with the half-full rule, gold has good chemical stability. In the metal market, gold, together with ruthenium, rhodium, palladium, osmium, iridium, platinum and other metals, are collectively called precious metals.