Yang Zhao (??) (584–606), formally Crown Prince Yuande (????, literally "the discerning and nurturing crown prince"), posthumously honored as Emperor Xiaocheng (????, literally "the filial and successful emperor") with the temple name Shizong (??) during the brief reign of his son Yang Tong, was a crown prince of the Chinese dynasty Sui Dynasty. He was the oldest son of Emperor Yang (Yang Guang) who predeceased his father.