There are several types of strings used to make decorative knots. Circular strings used in accessories or pouches are called dongdahoe. Wide and flat strings used in waist belts are called gwangdahoe, whereas knots used in attire or ceremonial accessories are called gyeokdap or gyeolja. Knots date back to the primeval period, but the techniques for making knots or dyeing them as handed down in this country were introduced from China during the Three Kingdoms Period. During the Joseon Period, the government designated knot craftsmen. As for the materials used to make knots, there are threads made of silk, ramie, mulberry, hemp, and woolen yarn. Knot shapes vary depending on the color, thickness, and methods used for tying. The names used to call them differ from region to region. The names were based on household items, flowers, or insects, such as ginger piece, butterfly, dragonfly, chrysanthemum, etc. Tassels were attached to the lower end of the decorative knots used for Musical instruments, vehicles, or Buddhist ceremonies. There were diverse types and levels of tassels depending on their use, i.e., whether they were for the Royal Palace or ordinary households.