Yang Gao (楊杲; 607 – 11 April 618),[1] nickname Jizi (季子), was an imperial prince of the Chinese Sui dynasty.
Emperor Yang, when he was under siege by the Eastern Turk leader Shibi Khan in 615 at the seat of Yanmen Commandery in present-day Daixian, Shanxi,[2] was recorded as so desperate that he was not doing anything except holding Yang Gao and crying.
In 618, while Emperor Yang was at Jiangdu (江都, in modern Yangzhou, Jiangsu), forces participating in a coup led by the general Yuwen Huaji entered the palace and surrounded him.
Emperor Yang then offered to commit suicide but was strangled to death instead.
Empress Xiao and her ladies in waiting had to take decorative wooden boards within the palace to make makeshift caskets for Emperor Yang and Yang Gao.