They were titled kings , were vassals of Khitan Liao dynasty , and were careful to keep these convention in the correspondence with the suzerains .
The status of Goryeo rulers can be roughly summarized as naeje oewang ( emperor at home and king abroad ) .
rulers were titled kings , were vassals of Khitan Liao dynasty , and were careful to keep these convention in the correspondence with the suzerains .
The status of Goryeo rulers can be roughly summarized as naeje oewang ( emperor at home and king abroad ) .