During the reign of King Gongmin of the Goryeo Dynasty, two brothers were walking together when the younger brother discovered two gold nuggets and gave one to his older brother. The brothers reached Yangcheongang River (currently Gongnam Ferry on the Hangang River near Gayang), and they were crossing the river on a boat. The younger brother suddenly threw his gold nugget into the river. The older brother thought this was strange and asked him why. The younger brother answered, "I have always loved you dearly, but I was suddenly overcome with hatred after sharing the gold with you. That is why I think it is better to throw the gold away." The older brother responded, "You are indeed correct," and also threw his gold nugget into the water.