What are the five gold industries?

There are many things in the gold industry, including gold and silver, steel, aluminum and tin, as well as all precious minerals such as diamonds, precious stones, uranium, tungsten, buttons and inlays, as well as finance, securities, economy, finance, insurance, banks, farmers' associations, credit cooperatives, futures, metal machinery, metal tools, sandblasting, polishing, automobiles, trains, locomotives and bulldozers.

Electrician, industry, heavy industry, army, national defense, steel furniture, steel kitchenware, dentistry, orthopedics, nose, lungs, trachea, clocks, weighing scale, jewelry and other five elements belong to the gold industry.