Shotokan, Taekkyon, Tai Chi, and Kung Fu are the basic building blocks of Tang Soo Do. The Ko Dan Ja or Sa Bom Nim who teaches this art, will add his or her own personal style to the varied techniques, one steps, combinations and hyung. This is called Ryu Pa. Translated, it means "a river flows (runs) down divided." From Teacher to Student or Master to Disciple, the river flows, taking the path of least resistance. The river represents both the flow of knowledge, and the spirit of the Dao.