Generally speaking, China Gold and Old Temple Gold should have no moisture. If you want to buy, you should choose according to the market price, which is generally not wrong. If it is too cheap and there is no activity, there may be moisture, but the probability is not too high. Now people are trying to find a brand.
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The role of gold:
1, national currency reserve
As a monetary commodity, gold has long performed the functions of value scale, circulation means, storage means, payment means and world currency, of which the first two are basic functions.
2, personal financial assets investment tools
In the period of economic stability, people have little interest in gold. Because the act of simply storing gold has no interest income, and it also needs to pay the storage and custody fees, at this time, personal purchase of gold can only be regarded as a hobby of gold collectors, and can not be regarded as a means of investment preservation.
3. Special materials to beautify life
About two-thirds of the gold produced in the world every year is used as decorations, mainly in the jewelry industry. Gold has a long history as an ornament, and many countries in the world have left a historical record of making jewelry with gold. Gold ornaments fully embody the characteristics of gold-beauty, softness and strong corrosion resistance.
4. Raw materials in industrial, medical and high-tech fields.
At the beginning of the 20th century, gold began to be widely used in industry, medical care and high-tech fields. Gold has good electrical conductivity, thermal conductivity, corrosion resistance, tensile resistance, wear resistance and arc resistance, and is widely used in aerospace, electronic appliances and other industries.
Gold is a precious metal and one of the earliest metals discovered, developed and utilized by human beings. It is not only an important raw material for making jewelry and coins, but also an important reserve material for the country, and is known as the "king of metals". It is not only regarded as a symbol of beauty and wealth, but also has its unique value and benefits mankind.
With the development of science and technology and modern industry, gold plays an important role in aerospace, medicine, electronics and other industrial fields. The use of gold is more and more extensive, and the consumption is increasing, which has aroused the world's attention and interest in gold.
Gold has good ductility. One or two pure gold can be hammered into gold leaves with a thickness of110000 mm and an area of 9 square meters. When the sun passes by, the golden leaves are transparent and can appear green. 50 grams of gold can run 8 kilometers, thin (1.6 smaller than hair, 7 human hairs).
The volatility of gold is very small, generally speaking, melting and volatilization can be ignored. The evaporation of gold in gas is 6 times that in air, and the loss of gold in carbon monoxide is 2 times that in air. The volatilization rate of gold is closely related to its impurity content.