 Around the near year 556, after Tujue's Mugan Khan Ashina Qijin thoroughly crushed Rouran's last khan Yujiulü Dengshuzi, Yujiulü Dengshuzi fled to Western Wei.Ashina Qijin demanded the execution of Yujiulü Dengshuzi, and Yuwen Tai, fearing a Tujue attack, turned Yujiulü Dengshuzi and 3000 of his followers to the Tujue ambassadors, who slaughtered them.Also around the new year 556, Yuwen Tai promulgated a new government structure, dividing the government into six ministries, based on the Zhou Dynasty model.