高熲
Also in summer 607, Emperor Yang embarked on a tour of the northern provinces, building an imperial highway from Chang'an to Jinyang (晉陽, the capital of Bing Province). He then personally visited the imperial tent of Ashina Rangan, whose display of submission and loyalty caused Emperor Yang to bestow much honor and wealth on him. When the senior officials Gao Jiong, Yuwen Bi (), and Heruo Bi privately expressed disapproval, Emperor Yang discovered their criticism and put all of them to death, while removing Su Wei, who also discouraged him from giving excessive rewards to Ashina Rangan, from his post. (Traditional historians attribute Gao's death to Gao's refusal to keep Chen Shubao's Consort Zhang alive in 589.) As Xiao Cong had a deep friendship with Heruo Bi, and there had been rumors that the Xiaos would rise again, the superstitious Emperor Yang also removed Xiao Cong from his post.