Yong Yang (? -604), the word "Tiqifa", the eldest son of Emperor Wendi of Sui Dynasty, the same mother and brother of Emperor Yangdi, and the mother document queen Dugujialuo.
In the Northern Zhou Dynasty, because of his grandfather Yang Zhong's meritorious service, he was named Hou Boan. After Emperor Wendi came to power, he made Yong Yang a prince, a general and a secretariat of Luozhou, and was promoted to Changning county magistrate. On February 14th, the first year of Emperor Yangdi (58 1), Emperor Wendi abdicated to the throne, and on February 17th, Yong Yang was appointed as the Crown Prince, making Yong Yang participate in military affairs decision-making.
However, before long, Emperor Wendi of Sui became more and more disgusted with Yang Yong, and died of depression because Yong Yang doted on Princess Yunzhaoxun. Emperor Wendi of Sui Dynasty suspected that Yong Yang and Yun Zhaoxun were plotting to kill Yuan Fei. In addition, his mother Dugu Jialuo and his second brother Yang Guang slandered Emperor Wendi many times, and Emperor Wendi deposed Yong Yang and made Yang Guang a prince. After Yong Yang was deposed, he sought audience with Emperor Wendi of Sui Dynasty many times, but all failed.
Emperor Wendi of Sui Dynasty was ill in Renshou Palace, and Yang Guang was rude to his favorite wife, Mrs. Xuanhua, who told him about it. Wendi felt that he had wronged his eldest son, Yong Yang, and wanted to re-establish Yong Yang as a prince, but Yang Guang stopped him. Then Wendi Sui Wendi suddenly collapsed and Yang Guang acceded to the throne. Immediately after Yang Di acceded to the throne, he handed down the imperial edict and put Yong Yang to death. Yang Guang later made Yong Yang king of Fangling.