정재 Jeongjae is Korean traditional court dances were purpose of entertainment at festive banquets and rituals. Developed from Goryeo Dynasty (918 – 1392) court dance is based on reserved and controlled emotional expressions. Extroverted movements are considered inelegant. In every court dance the hands are completely concealed with long coverlets, called Hansam, a type of long tube-like sash draped over each hand. Openly naked hand is considered disrespectful in the court dance.

Court dances are performed in luxurious costumes, with slow and graceful movements, accompaniment of singing at the beginning and end to explain the theme of the dance and the content usually suggests the grandeur of the Dynasty and the rulers. In the past times, Jeongjae were performed for the royal family, court officials, and foreign envoys or for festive occasions sponsored by the state.

Korean traditional court dance, Monggeumcheok (몽금척), dream of golden ruler dance, created in the early of Jeoseon Dynasty. The script of this dance was written by Jeong Dojeon one year after the foundation of Jeoseon Dynasty in 1393.

Photo credit : video.agaclip.com
Video credit : Korean traditional court dance mong gum chok 몽금척, uploaded by HyangAk on Youtube.

References :
An Introduction to Korean Traditional Performing Arts by Nam Sang-suk and Gim Hae-suk.
Wikipedia.