 He then effectively forced Emperor Gaozu to first create him crown prince and then yield the throne to him (as Emperor Taizong).He reorganized the government, and as part of the reorganization, Yuwen Shiji was made the "Zhongshu Ling" (中書令), the head of the legislative bureau and clearly a chancellor.In 627, while Yuwen Shiji retained the title of "Zhongshu Ling", he was no longer actually chancellor, as he was made the commandant at Liang Prefecture (涼州, roughly modern Wuwei, Gansu).