What is "cheopji"

Cheopji ( hangul:첩지 ; hanja:疊紙) is a Korean hair accessory decorating the chignon of ladies when they wear a ceremonial dress. It is usually made of silver, and a frog-shape is its common form. The use of cheopji began after Baljaegaeheok(hangul: 발제개혁; hanja: 髮制改革; a reformation that prohibited Gache hair style, then promoted Chignon hair style) proclaimed by Yeongjo of Joseon. It was used routinely at court, but ordinary people were to use this only when they wear a ceremonial dress.