According to the Chinese historical work "Book of Later Han" (in volume 85), Taejo died in the year 121, and his son Chadae stepped up. After Emperor An of Han decided not to initiate another battle with Goguryeo, Chadae settled peace with Han Dynasty in the following year. The imperial edict for this event was recorded as well. This date of death would involve a reign of 68 years—still one of the thirty longest reigning monarchs--and a lifespan of 74 years, in contrast to a nigh-supernatural 118-year longevity.