One matter at which Emperor Mingyuan did not listen to Cui Hao, however, was in his attempt to stop the Jin general Liu Yu from destroying Later Qin, as his wife Consort Yao was the Later Qin emperor Yao Hong's sister. In 416, when Liu Yu tried to advance his main fleet west on the Yellow River, Emperor Mingyuan ordered his army to harass the Jin fleet, against Cui's suggestion that doing so would make Northern Wei bear the brunt of Jin attack. Indeed, after some limited success in Northern Wei's harassment campaign, Liu Yu had his general Ding Wu (丁旿) land on the northern bank and deal Northern Wei a major defeat, before resuming the advancement. This ended Emperor Mingyuan's attempt to save Later Qin, and he regretted not listening to Cui in this matter. It was also around this time that Cui Hao made the perceptive observation that after Liu Yu destroyed Later Qin, he would return to the Jin capital Jiankang and usurp the throne, and that the troops that he left to hold Later Qin territory would become trapped. He also suggested that Northern Wei should be patient, and that one day the territory would be Northern Wei's. Pleased with Cui's analysis, Emperor Mingyuan awarded him wine and salt, stating to him, "Your words are just as like wine and salt, and therefore I want to share these with you." In 418, after another astrological sign appeared showing the end of a state, Cui publicly stated that it meant the end of Jin, and when Liu Yu seized the Jin throne in 419 and established Liu Song, Cui was shown to be correct. Also in 419, Cui Hao's father Cui Hong died. Cui Hao inherited his father's title of Duke of Baima.