ug am ▁(" black ▁stone "). ▁He ▁gained ▁em in ence ▁not ▁only ▁as ▁a ▁scholar ▁but ▁as ▁a ▁rever ed ▁politician ▁and ▁reform er , ▁att aining ▁the ▁position ▁of ▁Four th ▁State ▁Coun c ill or / V ice ▁Prime ▁Minister ▁( J wach anse ong ▁ 左 <0xE8> <0xB4> <0x8A> 成 ) ▁in ▁the ▁Jose on ▁State ▁Council ▁( u ije ong bu ). ▁ ▁Selected ▁works ▁▁ ▁" U gy e ▁j ip " ▁( 우 계 집 , ▁ <0xE7> <0x89> <0x9B> 溪 集 ) ▁( Work s ▁of ▁U gy e ) ▁▁ ▁" J um un ▁j ig ye ol " ▁( 주 문 지 결 , ▁ 朱 門 <0xE6> <0x97> <0xA8> <0xE8> <0xA8> <0xA3> ) ▁ ▁" W ih ak ▁j ib ang " ▁( 위 학 지 방 , ▁ <0xE7> <0x88> <0xB2> 學 之 方 ) ▁ ▁Father ▁ ▁He ▁was ▁the ▁great - grand father ▁of ▁Y un ▁Je ung ▁through ▁his ▁daughter , ▁Lady ▁Se ong , ▁who ▁married ▁Y un ▁H w ang ▁and ▁produced ▁a ▁son , ▁Y un ▁Se on - geo , ▁father ▁of ▁Y un ▁Je ung . ▁ ▁See ▁also ▁▁ ▁Korean ▁Conf u cian ism ▁ ▁Ne o ▁Conf u cian ism ▁ ▁Y i ▁I ▁ ▁Y i ▁H w ang ▁ ▁Je ong ▁gu ▁ ▁Cho ▁s ik ▁ ▁References ▁ ▁External ▁links ▁▁ ▁Se ong ▁Hon : na ver ▁▁ ▁Se ong ▁Hon ▁▁ ▁se ong ▁hon ▁▁ ▁Korean ▁philosophy