Thousands of feet of silver usually have two signs; One symbol is "Thousand Foot Sound" with the same name, and the other is "S999". Qianzu silver refers to silver with a silver content of 99.9%, and the silver content used to make Qianzu silver jewelry shall not be lower than 99.9%, which is also the highest purity standard of silver products stipulated in the current national standard "Regulations and Naming Methods of Precious Metals in Jewelry".

Because it is 99.9% silver, it is easy to identify from the appearance, which is the true color of bright silver. This kind of silver material, because of the metallic characteristics of silver itself, makes 99.9% silver soft, which is not suitable for making jewelry inlaid with imitation platinum or K gold. However, when it is used to make plain silver jewelry, it has the unique texture of silver jewelry, and because of the characteristics of silver, the purer silver is more sensitive to the change of skin sweat, which is especially suitable for children.

Thousands of feet Silver is a kind of silver jewelry making method that has just broken through in recent years. This kind of silver is the purest on the market at present. At present, due to the limitation of technological difficulty, although the main body of Qianzu silver ornaments must reach 99.9%, the silver content of its accessories may be slightly lower, but it should not be lower than 92.5% according to national standards.