Gao Jiong
In spring 607, he went to Luoyang to pay a visit to Emperor Yang. In summer, he was visited back by Yang. Khagan's display of submission and loyalty caused Emperor Yang to bestow much honor and wealth on him. When the senior officials Gao Jiong, Yuwen Bi (宇文弼), 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 khagan, from his post.