 Emperor Gaozu did so, and two months later passed the throne to Li Shimin, who took the throne as Emperor Taizong.Initially, Xiao Yu remained chancellor, but was soon conflicting with Feng Deyi, who was also chancellor, as "Shangshu Pushe" (by this point heads of the executive bureau, as Li Shimin had been head of the executive bureau, but his title "Shangshu Ling" had thus become a title that his subjects did not dare to take), over Feng's frequent changes of things that they had already agreed on, as well as some other new chancellors that Emperor Taizong had trusted and commissioned, including Fang Xuanling and Gao Shilian.In anger, Xiao submitted a secret petition to Emperor Taizong denouncing Feng, but the petition was inartfully written, offending Emperor Taizong.