Cameo, translated as cameo in Chinese, is a long-standing manual relief process, usually carved on agate, shell or colored gems. This ancient gem carving technique really appeared in ancient Egypt in the third century BC. Craftsmen create works on layers of silk agate, creating relief art with three-dimensional colors.

Later, in ancient Greece, relief was further developed and gradually formed a fixed style. Finally, it reached the peak of the Millennium in the hands of craftsmen in the ancient Roman Empire.

Cameo became popular in the 5th century A.D., bearing the brand of religion, idolatry and commemoration. It was originally reserved for royalty. Princes and nobles in ancient Rome often wore reliefs proudly, and the palm-sized reliefs declared their prominent position.