7 1 3 ) ▁and ▁his ▁second ▁son ▁Do - b ok ▁( 道 <0xE5> <0xBE> <0xA9> , ▁ 1 6 6 6 – 1 7 2 0 ) ▁were ▁the ▁last ▁of ▁the ▁line , ▁since ▁the ▁Southern ers ’ ▁fa ction ▁to ▁which ▁the ▁family ▁belonged ▁lost ▁power ▁in ▁ 1 6 9 4 . ▁Si - y un ▁retired ▁to ▁a ▁house ▁in ▁Mah ye on - ri ▁to ▁the ▁east ▁of ▁Se oul ▁( now ▁known ▁as ▁Nam y ang ju ) ▁in ▁ 1 6 9 9 , ▁which ▁was ▁to ▁be ▁Das an ' s ▁birth place . ▁His ▁el dest ▁son , ▁Do - ta e ▁( 道 泰 ) ▁lived ▁there ▁and ▁was ▁Das an ' s ▁direct ▁ancest or . ▁The ▁Southern ers ▁remained ▁ex cluded ▁from ▁official ▁positions ▁until ▁a ▁brief ▁period ▁that ▁began ▁during ▁the ▁reign ▁of ▁King ▁Je ong jo , ▁when ▁Das an ' s ▁father ▁was ▁appointed ▁magistr ate ▁of ▁Jin ju ▁county , ▁thanks ▁to ▁his ▁strong ▁links ▁with ▁the ▁powerful ▁Ch ae ▁Je - g ong ▁( <0xE8> <0x94> <0xA1> <0xE6> <0xBF> <0x9F> <0xE6> <0x81> <0xAD> , ▁ 1 7 2 0 – 9 9 ), ▁who ▁rose ▁until ▁he ▁was ▁appointed ▁third ▁state ▁coun c ill or ▁in ▁ 1 7 8 8 . ▁In ▁ 1 7 6 2 , ▁the ▁execution ▁of ▁Crown ▁Prince ▁S ado ▁by ▁his ▁father ▁the ▁king ▁so ▁shock ed ▁Je ong ▁J ae - won ▁that ▁he ▁with d