Yuchi Jiong
It was around this time that it came to Emperor Wu's attention that most of Yuwen Yun's associates were men of low character. At the suggestion of the superintendent of the crown prince's palace, Yuwen Xiaobo (), Emperor Wu made Yuchi Yun (), the well-regarded nephew of the general Yuchi Jiong (a cousin of Emperor Wu's), Yuwen Xiaobo's deputy. He also chose a number of men whose characters he had high regard for to serve in other posts as the crown prince's assistance—but Yuwen Yun resented these personnel changes.