Yang Su
It was said that although Yang Su had much contributions for him, Emperor Yang actually was very suspicious of Yang Su. When imperial astrologers informed Emperor Yang that the Sui region (central Hubei) would have a major funeral, Emperor Wen created Yang Su the Duke of Chu, technically a greater title—believing that the Chu and Sui regions were close enough that he could use Yang Su to deflect the ill fortune. When Yang Su grew ill in 606, Yang Guang sent the imperial physicians, along with the most precious medicines, to treat Yang Su, but closely monitored Yang Su's conditions, hoping that Yang Su would die. Yang Su himself knew of Emperor Yang's intentions, and therefore refused all treatment and did not take good care of his own body, stating to Yang Yue, "Why should I want to live?" He died in fall 606, and Emperor Yang honored him with a magnificent funeral. After Yang Xuangan rebelled in 613, all of Yang Su's sons were killed. Yang Su's tomb was destroyed, and Yang Su's body was burned by the general Wei Wensheng (衛文昇). But one daughter of his would later become a concubine of Emperor Gaozu of Tang and bear him a son named Li Yuanxiang (李元祥) and titled Prince of Jiang, while his granddaughter through his son Yang Xuanjing would become a concubine of Emperor Taizong of Tang and bear him a son named Li Fu (李福) and titled Prince of Zhao.