High Quality Content by WIKIPEDIA articles! Yang Hao (died 618), often known by his princely title of Prince of Qin, was one of the claimants of the throne of the Chinese Sui Dynasty at the dynasty's end. Yang Hao was a grandson of Sui's founder Emperor Wen. His father Yang Jun was the Prince of Qin. Yang Hao was one of Yang Jun's two sons, and his mother was Yang Jun's wife Princess Cui. In 597, angry and jealous over Yang Jun's favor for his concubines, Princess Cui poisoned melons that he was eating. Yang Jun grew ill, and went back from his defense post at Bing Province to the capital Chang'an for treatment. After he did so, Princess Cui's poisoning of him was discovered. Emperor Wen ordered that she be divorced and sent back to the household of her brother Cui Hongdu, and then ordered her to commit suicide.