Sc7 pure gold is produced in Leofoo with a gold content of not less than 99%. 999 pure gold means that the purity of gold reaches 99.9%, also known as "thousands of pure gold", which can also be said to be pure gold and 24k gold. This kind of gold ornaments are usually marked with thousands of gold, 999 gold, gold999 or g999.

Leofoo was established in Shenzhen in 2004. It is a well-known jewelry brand integrating jewelry marketing, research and development, design, manufacturing and retail, and enjoys a high reputation in China. 999 gold is the highest purity gold, so its color is red and yellow, and because of its high purity, its texture is soft and easy to deform.