In order to ensure the hardness, luster and beauty of jewelry, the raw material of gold jewelry is not a single pure metal, but an alloy body with gold as the main material. At present, China's jewelry industry mandatory standard 08 1 1887-2008 stipulates that gold jewelry can be roughly divided into 9K, 14K, 18K, 22K, pure gold and thousands of pure gold. It's the same in Hong Kong or Macau. The jewelry making process is the same, depending on whether you buy pure gold or K gold jewelry. Generally, jewelry manufacturers of big brands will have relatively guaranteed sample purity and reliability.