Master Sul Bong established a dojang by Sam Ji Lake in the Baekdoo Mountains .
Master Sul Bong taught his apostles a martial art based on the ideas of patriotism , filial piety , respecting the elderly and executing righteousness .
Master Sul Bong established a dojang by Sam Ji Lake in the Baekdoo Mountains and taught his apostles a martial art based on the ideas of patriotism , filial piety , respecting the elderly and executing righteousness .