伏允
In 608 as well, Pei Ju persuaded the Tiele tribes to attack Tuyuhun, forcing Tuyuhun's Busabuo Khan Murong Fuyun to flee. Murong Fuyun initially considered submitting to Sui, and Emperor Yang sent Yuwen with an army to welcome him. However, when Murong Fuyun changed his mind, Yuwen attacked him and seized much of Tuyuhun's people. When Murong Fuyun fled further, Emperor Yang had his forces seize Tuyuhun's territory, establishing four commanderies, to be populated with exiles.