Li Shimin's Accession as Emperor Taizong

Timeline

1. 626Chang'an · ShaanxiAfter the Xuanwu Gate Incident, Li Yuan had already made Li Shimin crown prince and entrusted him with military and state affairs; in the eighth month he issued an edict transferring the throne, calling himself retired emperor, completing the nominal transfer of power.
2. 626Taiji Hall · ShaanxiLi Shimin ascended the throne as emperor at the Taiji Hall, installed Empress Zhangsun, granted a general amnesty, and announced the new policy direction; confidence gradually settled at court and among the people.
3. 627Chang'an · ShaanxiIn the first month of the following year the era name was changed to Zhenguan; imprisoned imperial clansmen were released, the palace staff was streamlined, and capable ministers such as Fang Xuanling, Du Ruhui, and Wei Zheng were employed, marking the formal opening of a new political chapter under Taizong.