Qing Yu Nian Yi Gui Pin's son was called Li Chengping.
The son of Yi Guipin was Li Chengping.
The son of Yi Guipin in Qingyu was Li Chengping.
The son of Yi Guipin in the year of Qing was called Li Chengping.
The son of Yi Guipin in the year of Qing was called Li Chengping.
The son of Yi Guipin in the year of Qing was called Li Chengping.
Qing Yu Nian Yi Gui Pin's son was called Li Chengping.
Yes, Yi Guipin's son was the Third Prince, Li Chengping.
Qing Yu Nian Yi Gui Pin's son was called Li Chengping.
Yi Guipin's son was not the Crown Prince. The Crown Prince was the son of the Empress.