Yang Su (Chinese: 楊素; 544 – 31 August 606), courtesy name Chudao (處道), posthumous name Duke Jingwu of Chu (楚景武公), was a Chinese military general and politician of the Sui dynasty whose authority eventually became nearly as supreme as the emperor's. Traditional sinologists generally believed that he was involved in the suspected murder of Emperor Wen in 604, at the behest of Emperor Wen's son Yang Guang (the later Emperor Yang). His son Yang Xuangan later rebelled against Emperor Yang in 613 but was defeated and killed, and Yang Su's other sons were also executed.
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During Northern Zhou
Yang Su was born in 544. His grandfather Yang Xuan (楊喧) was a mid-level official under the Northern Wei or its branch successor state Western Wei. Yang Su's father Yang Fu (楊敷) served as a general for Western Wei's successor state Northern Zhou, but in 571, while defending Dingyang (定陽, in modern Linfen, Shanxi), Yang Fu was defeated and captured by the Northern Qi general Duan Shao. Yang Fu refused to surrender and was kept in captivity for the rest of his life, but it is not known when he died.
After Yang Fu's death, Yang Su, who was considered highly talented in his youth, repeatedly sought posthumous recognition for his father from Emperor Wu of Northern Zhou. Eventually, Emperor Wu was so pestered that he ordered that Yang Su be killed—perhaps stating the order publicly to scare Yang Su so that he would relent. Instead of begging for forgiveness, however, Yang Su yelled out, "I serve a ruthless emperor, and it is proper for me to die!"
Emperor Wu, impressed with Yang Su's fortitude, released him and gave Yang Fu posthumous honors, including the title of Duke of Linzhen. He made Yang Su an official in his administration, and once, when he had Yang Su draft an edict for him and was impressed by both the fast speed that Yang Su wrote the edict and the beauty of the language, he commented, "Just work hard. Honor and wealth will come to you."
Yang Su responded, "I am worried that I will be forced to accept honor and wealth, as I have no desire for them."
In 575, when Emperor Wu launched a major attack on Northern Qi, he granted Yang Su's request to lead the remains of Yang Fu's old army. While Emperor Wu was soon forced to abandon the campaign, Yang Su was, for his contributions, created the Viscount of Qinghe. When Emperor Wu relaunched the attack on Northern Qi in winter 576, Yang Su served under Emperor Wu's brother and major general Yuwen Xian the Prince of Qi, and during a battle, when Yuwen Xian was ambushed by forces under Northern Qi's emperor Gao Wei, it was Yang Su who fought hard to save Yuwen Xian. Thereafter, he continued to make contributions under Yuwen Xian during the campaign against Northern Qi.
After Emperor Wu conquered Northern Qi in 577, he promoted Yang Su's title to Duke of Chen'an. In 578, he served under the general Wang Gui (王軌) in defeating the Chen dynasty general Wu Mingche, and for this contribution, Emperor Wu created his brother Yang Shen (楊慎) the Marquess of Yi'an. After Emperor Wu's death later in 578 and succession by his son Emperor Xuan, Emperor Xuan conferred the title of Duke of Linzhen, which Emperor Wu had posthumously created Yang Fu, on Yang Su, transferring Yang Su's title of Duke of Cheng'an to his brother Yang Yuē (楊約). Yang Su subsequently served under the general Wei Xiaokuan in capturing the region between the Yangtze River and the Huai River from Chen.
In 580, Emperor Xuan, who had by that point become retired emperor, died, and Emperor Xuan's father-in-law Yang Jian seized power as regent over Emperor Xuan's son Emperor Jing. Yang Su became close to Yang Jian, and Yang Jian made him the governor of the important Bian Province (汴州 roughly modern Kaifeng, Henan). However, before Yang Su could report to Bian Province, the general Yuchi Jiong, suspicious of Yang Jian's intentions, rose against him.
One of Yuchi's supporters, Yuwen Zhou (宇文冑) the governor of Ying Province (滎州 roughly modern Zhengzhou, Henan) defended Hulao Pass against Yang Jian's forces, and Yang Jian sent Yang Su against Yuwen Zhou. Yang Su was able to defeat Yuwen Zhou, and after Yuchi had been defeated and had committed suicide, Yang Jian made Yang Su the commandant at Xu Province (徐州 roughly modern Xuzhou, Jiangsu) and promoted his title to Duke of Qinghe, transferring his title of Duke of Linzhen to his brother Yang Yuè (楊岳 note different tone and character than the other brother).
During Emperor Wen's reign
In 581, Yang Jian had Emperor Jing yield the throne to him, ending Northern Zhou and establishing Sui dynasty as its Emperor Wen. Yang Su continued to serve in Emperor Wen's administration including a spell helping prepare the Kaihuang Code on which Emperor Wen's legal reforms were based. In 584, during an argument with his wife Zheng Qiye (郑祁耶), he angrily stated, "If I become emperor, you will not be empress!" Zheng Qiye, in anger, reported the comment to Emperor Wen, who removed Yang Su from his post as a punishment. In 585, Emperor Wen restored him and made him the commandant at Xin Province (modern eastern Chongqing) to prepare an attack against Chen down the Yangtze River. While at Xin Province, he built large ships in anticipation of the attack.
In winter 588, Emperor Wen launched the attack, commissioning his sons Yang Guang the Prince of Jin and Yang Jun, along with Yang Su, to command the three main prongs of the attack, with Yang Guang in overall command of the operations. Yang Su's responsibility was to take his forces down the Yangtze and attack cities on the river. He passed through the Three Gorges and defeated the Chen general Qi Xin (戚昕). He soon ran into heavy resistance by the Chen general Lü Zhongsu (呂忠肅) and initially was repelled, but eventually was able to defeat Lü. With Chen Shubao's cousin Chen Huiji (陳慧紀) abandoning the region to make one last-ditch attempt to reach the Chen capital Jiankang to help defend it against Yang Guang's attack, Yang Su encountered no further resistance, and soon news that Jiankang had fallen arrived, and the local provinces all surrendered to him or Yang Jun, whom he met at Hankou (漢口 in modern Wuhan, Hubei). Emperor Wen subsequently promoted Yang Su to the greater title of Duke of Yue and transferred his title of Duke of Qinghe to his son Yang Xuanjiang (楊玄獎), while making his heir apparent Yang Xuangan a mid-level official. He was briefly made the commandant at Jing Province (荊州 roughly modern Jingzhou, Hubei), but in summer 588 was recalled to the capital to be the head of the examination bureau (門下省 Menxia Sheng) -- one of the most important officials in the imperial government. In 590, he was made the head of the legislative bureau (內史省 Neishi Sheng).
Later in 590, with Chen's former territory up in rebellions against imposition of Sui laws, Yang Su was put in command of a large army to attack the various rebel leaders. He defeated Shen Xuanhui (沈玄懀) and Gao Zhihui (高智慧), eventually quelling much of the former Chen territory. Emperor Wen awarded him with many gifts. Based on Yang Su's conduct during the campaign, the historian Sima Guang, in his Zizhi Tongjian, commented:
During Emperor Yang's reign
Upon hearing Emperor Yang's ascension, Yang Liang, then the commandant at Bing Province (并州 roughly modern Taiyuan, Shanxi) and in control of the territory north of the Yellow River, rebelled—inexplicably declaring, as his reason for rebelling, that Yang Su had committed treason. Emperor Yang sent Yang Su to attack Yang Liang, and Yang Su, after capturing Yang Liang's major general Xiao Mohe, forced Yang Liang's surrender. For Yang Su's contributions, Emperor Yang gave his sons Yang Wandan (楊萬石), Yang Renxing (楊仁行), and Yang Xuanting (楊玄挺) all mid-level imperial posts and much treasure, previously owned by Yang Liang.
In spring 605, Emperor Yang began to expand Luoyang to serve as the eastern capital. Yang Su was commissioned to head the project.
It was said that although Yang Su had much contributions for him, Emperor Yang actually was very suspicious of Yang Su. When imperial astrologers informed Emperor Yang that the Sui region (central Hubei) would have a major funeral, Emperor Wen created Yang Su the Duke of Chu, technically a greater title—believing that the Chu and Sui regions were close enough that he could use Yang Su to deflect the ill fortune. When Yang Su grew ill in 606, Yang Guang sent the imperial physicians, along with the most precious medicines, to treat Yang Su, but closely monitored Yang Su's conditions, hoping that Yang Su would die. Yang Su himself knew of Emperor Yang's intentions, and therefore refused all treatment and did not take good care of his own body, stating to Yang Yue, "Why should I want to live?" He died in fall 606, and Emperor Yang honored him with a magnificent funeral. After Yang Xuangan rebelled in 613, all of Yang Su's sons were killed. Yang Su's tomb was destroyed, and Yang Su's body was burned by the general Wei Wensheng (衛文昇). But one daughter of his would later become a concubine of Emperor Gaozu of Tang and bear him a son named Li Yuanxiang (李元祥) and titled Prince of Jiang, while his granddaughter through his son Yang Xuanjing would become a concubine of Emperor Taizong of Tang and bear him a son named Li Fu (李福) and titled Prince of Zhao.
It was said that one of Yang Su's favorite dishes was fried rice and that he popularized the dish. In the Book of Sui, Yang Su was described as a man with imposing look and a shiny long beard.
In popular culture
Yang Su is portrayed by Hong Kong actor Lau Dan in TVB's 1987 series The Grand Canal (大運河).
Reading
Book of Sui, vol. 48. [1] Archived 2007-10-11 at the Wayback Machine
History of Northern Dynasties, vol. 41.[2] Archived 2006-02-18 at the Wayback Machine
Zizhi Tongjian, vols. 170, 172, 174, 175, 176, 177, 178, 179, 180.