1. There is no gold with the purity of 100%. 24K gold is usually considered as pure gold, but its gold content is only 99.99%.

2. Gold is very malleable. An ounce of gold can be stretched to 50 miles long, so gold has the greatest pull in metals.

3. The ductility of gold is second to none, which can make very thin gold slices. The ancients often made gold into thin slices for architectural decoration.

4. Gold itself will not rust, but the chemical affinity between gold and sulfide is very strong, and it is easy to adsorb hydrogen sulfide acid gas in the air, which may lead to dark colors such as orange and brownish red on the surface.

5. Selling point of gold: Gold is an international hard currency and is often used in international reserves. It belongs to one of the five major currencies in international settlement and is an excellent hedging tool.