Kukkiwon/WT Taekwondo uses the following series of forms called the Yudanja series for Black Belt forms:

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• Koryo (고려) - first dan, also spelled Goryeo and Koryeo

          ("learned man", symbolizing a wise person)​

• Keumgang (금강)) - second dan

          ("diamond", symbolizing hardness, unbreakable)

• Taebaek (태백)) - third dan

          ("sacred mountain", symbolizing spirituality)

• Pyongwon (평원)- fourth dan, also spelled Pyeong-won

          ("open plain", symbolizing peacefulness)

• Sipjin (싶진)) - fifth dan, also spelled Shipjin

          ("eternal 10", symbolizing health and longevity)

• Jitae (지태) - sixth dan

          (symbolizes mankind, connection between heaven and earth)

• Cheonkwon (천권) - seventh dan, also spelled Cheon-gwon

          ("sky", symbolizing piety)

• Hansoo (한수) - eighth dan, also spelled Hansu

          ("water", symbolizing adaptability)

• Ilyeo (일여) - ninth dan

        (symbolizing the Buddhist concept of oneness of the mind & body)

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Each of the yudanja forms has a floor pattern that traces out a Chinese character or other symbol. Each character is said to represent a characteristic that should be exhibited by a taekwondo master: wise, unbreakable, spiritual, peaceful, long-lived, pious, adaptable