Yuwen Hu
In spring 563, while on a visit to Yuan Province (原州, roughly modern Guyuan, Ningxia), Emperor Wu suddenly returned to the capital Chang'an without explanation. One of his attendants, Houmochen Chong () the Duke of Liang, speculated to his associates that Yuwen Hu had died. When Houmochen's speculations became known, Emperor Wu publicly rebuked Houmochen, and the same night, Yuwen Hu sent troops to surround Houmochen's mansion, forcing him to commit suicide. Soon thereafter, he publicly bestowed Yuwen Hu the honor of having his name be subject to naming taboo, an honor that Yuwen Hu declined.