 Later, after the legislative bureau was renamed "Zhongshu Sheng" () in 620, Xiao Yu remained its head with the new title of "Zhongshu Ling" ().Per Xiao's recommendations, Emperor Gaozu made Feng Deyi "Zhongshu Ling" as well, sharing the position with Xiao.In 621, he was similarly put in charge, along with Pei and Chen Shuda, of interrogating Li Zhognwen () the Duke of Zhenxiang, who was also charged with treason, and while Xiao's recommendations were unclear, Li Zhongwen was also executed.