Old Book of Tang: Crown Prince Li Chengqian committed a crime and was demoted to commoner; Prince Jin Li Zhi (Gaozong) was installed as crown…
Crown Prince Li Chengqian committed a crime and was demoted to commoner; Prince Jin Li Zhi (Gaozong) was installed as crown prince.
夏四月庚辰朔，皇太子有罪，廢為庶人。
Location: 舊唐書 卷3 貞觀17年 4月
Crown Prince Chengqian was deposed, and Li Zhi, Prince of Jin, was made crown prince.
立晉王治為皇太子
Location: 新唐書 卷002 太宗 貞觀17年4月
Place: 長安
Show on the map — open Old Book of Tang (Jiu Tangshu), Annals