Examined in this article is King Gongyang-wang(恭讓王)s dispatching[朝見] of his son and crown prince(世子) to China, and how such sending was related to the earlier attempt to arrange King Chang-wang(昌王)s Chinjo(親朝) visit to Ming(明). Even after Yi Seong-gye(李成桂) turned his troops around at Wihwa-do(威化島), King Wu-wang(禑王)s legitimacy was not officially challenged, and therefore his son Chang-wang was allowed to be enthroned. But Ming emperor Hongmu-je(洪武帝), under the name of not recognizing the person in throne apparently erected by vassals who killed the former king, denied the Goryeo kings request. In response, Yi Seong-gye raised the notion of both Wu-wang and Chang-wang being the son of Shin Don(辛禑辛昌論), and under the name of reviving the cou...