Emperor Wen had little actual power, and also in 538, over Yuwen's desire for an alliance with Rouran, he was forced to depose Empress Yifu and marry the daughter of Rouran's Chiliantoubingdoufa Khan Yujiulü Anagui as his empress.
(Some historical sources give his birthdate as 448, a date that appears rather unlikely because that would make him only six years older than his son, Emperor Xianwen.) His mother, Consort Yujiulü, was the sister of the general Yujiulü Pi (郁久閭毗), who had been a member of the Rouran royal house but who had surrendered to Northern Wei.
In fall 545, due to an alliance between Western Wei and Rouran to attack Eastern Wei, Gao Huan sued for peace with Rouran by requesting a marriage between a daughter of Rouran's Chiliantoubingdoufa Khan Yujiulü Anagui and Gao Cheng.
In 411, the khan of Rouran, Yujiulü Hulü offered a tribute of 3,000 horses to Feng Ba and requested to marry Feng Ba's daughter Princess Lelang.
His mother Consort Yujiulü was a sister of Rouran's Chilian Khan Yujiulü Wuti, who had become an imperial consort of Emperor Taiwu's as part of a peace-marriage arrangement in 434, whereby he married Consort Yujiulü while marrying his sister or cousin Princess Xihai to Yujiulü Wuti.
He was the son of Yujiulü Hulü who in 414 was overthrown by his cousin Yujiulü Buluzhen, Yujiulü Datan would overthrow his cousin and succeed his father as khan of the Rouran.
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.