sentences:  On November19, 1936, he became principal of Dongsung Commerce High School (동성상업고등학교 교장;東星商業高等學校 校長).At the same time he took on the additional role of principal of Gyesong Elementary School (계성국민학교;啓星國民學校) in Jongro, Seoul, in April 1939.That September, he was appointed chairman of the Seoul Catholic Young Men's National Union (경성가톨릭청년회, 京城天主敎靑年會).