 He was the South Korean National Champion from 1962–1966.On his retirement, he was inducted into the Korean Amateur Athletic Association's Hall of Fame as the only undefeated taekwondo champion from more than 200 International matches.Park moved to Thailand in 1966 at the personal request of King Bhumibol of Thailand to teach taekwondo to the Thai royal family and US military forces, specifically US Army Security Agency units in Bangkok, (83rd ASA Special Operations Unit,) and in Ban Non Song, (7th ASA Field Station.)