 In another example, in fall 554, after he had put the official Yuan Xu (元旭), a former Northern Wei prince, to death, he remembered the snubs that Gao Longzhi, who was a friend of Yuan Xu's, had shown him before he became Eastern Wei's regent, and he had Gao Longzhi battered so severely that Gao Longzhi died several days later—and at a later point, still angry at Gao Longzhi, arrested Gao Longzhi's 20 sons and, with 20 executioners lined up, had the sons beheaded simultaneously, and then threw their bodies and Gao Longzhi's body into the Zhang River.Starting in 551, Emperor Wenxuan had ordered his official Wei Shou to compile a history of Northern Wei.Wei Shou completed the work in 554, but his work ("Book of Wei") was criticized by many to be defamatory to ancestors of many political enemies (so much so that they referred to the work as "Huishu" (穢書—the Book of Filth)), and several officials filed reports condemning Wei Shou.