Yuwen Huaji
Yang Jian (; 585–618), courtesy name Shiku (世胐), nickname Ahai (阿孩), was an imperial prince of the Chinese Sui Dynasty. During the reign of his father Emperor Yang, he carried the title of Prince of Qi. When his father was killed in a coup led by the general Yuwen Huaji in 618, Yang Jian and his two sons were also killed.