Gao Jiong
In 607, despite Su's opposition, Emperor Yang built a section of the Great Wall from Yulin to Zihe (紫河, in modern Hohhot, Inner Mongolia), employing over a million men in labor. Su was subsequently removed from office. However, Su escaped the fate of Gao Jiong, Yuwen Bi (), and Heruo Bi (), who were executed for their similar oppositions to Emperor Yang's construction and military campaigns.