Some authoritative experts said that "thousands of gold" is the national standard, while "ten thousand gold" is only the propaganda tone or advertising words of merchants, and does not necessarily represent the gold content. There is no such thing as "universal oil" in the national standard. The national standard is three nines, only gold bars have three nines and four nines. Even if the consumer's shopping receipt clearly says "ten thousand gold", it can't pass the quality inspection certificate, because according to the national regulations on the naming of precious metals, "ten thousand gold" is the highest purity in the national standard for the color of gold jewelry, and there is no relevant regulation on "ten thousand gold" in the standard. Moreover, with the accuracy of the existing instruments, even if the purity of gold jewelry does reach 99.99%, the general testing institutions can't detect it. In fact, "ten thousand gold" is actually a loophole in the national standard. The so-called "ten thousand gold" has become a concept and has no practical significance. "Tiger balm" is not a national standard, but an enterprise standard. The expression of "ten thousand gold" is actually a means of promotion for merchants, using the common sense that the purer the gold, the better to attract consumers to buy. However, because the price of "ten thousand gold" is higher than that of "thousands of gold", merchants can gain more profit space in this way. It is inevitable that some unscrupulous merchants will take advantage of the loopholes and label gold ornaments with a color less than four nines as "ten thousand gold" in order to obtain higher profits. [4]