Editing Hapkido (section)

=== Seo Bok-seob ===
{{Main|Seo Bok-seob}}

Choi's first student and the first person known to have opened up a dojang under Choi was Seo Bok-seob (서복섭, also spelled Suh Bok-sup).<ref name=segye/>

In 1948, when Seo Bok-sub was still in his early 20s, he had already earned his black belt in [[judo]] and was a graduate of Korea University. After watching Choi Yong-sool successfully defend himself against a group of men when an argument erupted in the yard of the Seo Brewery Company, Seo who was son of the chairman of the company, invited Choi to begin teaching martial arts to him and some workers at the distillery where he had prepared a dojang.<ref name = "Hapkido Bible"/>

In 1951, Seo opened up the first proper dojang called the "Daehan Hapki Yukwonsool Dojang (대한합기유권술도장)". Seo also incorporated many of judo's throws and ground work techniques to the teachings of master Choi. The first symbol for hapkido was designed by Seo, which was used to denote the art was the inverted arrowhead design featured in both the modern incarnation of the KiDo Association and by Myung Kwang-Sik's World Hapkido Federation. Choi Yong-sool was also employed during this time as a bodyguard to Seo's father who was a congressman. Seo and Choi agreed to shorten the name of the art from 'hapki yu kwon sool' to 'hapkido' in 1959.<ref>{{cite journal|last=Wollmershauser|first=Mike|year=1996|title=The Beginning of Hapkido; An Interview with Hapkido Master Seo Bok-Seob|journal=[[Taekwondo Times]]|volume=16|issue=8|editor=Eric Hentz}}</ref>