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.
When senior officials Gao Jiong, Yuwen Bi (宇文弼), and Heruo Bi voiced disapproval of Emperor Yang's actions privately, leading to their execution.  Emperor Yang also removed Su Wei, who had advised against lavish gifts for the khagan, from his position.