Emperor Yang of Sui spouse Empress Xiao
As Prince of Jin
Also in 581, Emperor Wen made Yang Guang the commandant at Bing Province (并州, roughly modern Taiyuan, Shanxi), in charge of the provinces north of the Yellow River. In 582, Emperor Wen set up a branch of the executive bureau of his government (尚書省, Shangshu Sheng) at Bing Province and made Yang Guang its head. He made the official Wang Shao (王韶) the deputy head and had him assist Yang Guang. Later in 582, Emperor Wen took a daughter of his vassal Emperor Ming of Western Liang (Xiao Kui) to be Yang Guang's wife and princess. It was said that Yang Guang loved and respected her.
In 584, after some Sui military and diplomatic victories, Tujue's Shabolüe Khan Ashina Shetu submitted to Sui. Yang Guang suggested to Emperor Wen that he rejected Ashina Shetu's overture and launch a major attack on Tujue, but Emperor Wen refused. In 585, with Ashina Shetu under attack from one of his subordinate khans, the Datou Khan Ashina Dianjue, Emperor Wen in fact sent Yang Guang to aid Ashina Shetu.
In 588, Emperor Wen moved Yang Guang's headquarters to Shouchun (壽春, in modern Lu'an, Anhui), and made him the commandant there as well as the head the branch of the executive bureau established there. In winter 588, Emperor Wen launched a major attack on the rival Chen dynasty. Yang Guang, his brother Yang Jun, and the general Yang Su were in command of the three main prongs of the operation, with Yang Guang in command of the eastern prong as well as the overall operation. The key official Gao Jiong served as Yang Guang's assistant. In spring 589, the generals Han Qinhu (韓擒虎) and Heruo Bi (賀若弼), both under Yang Guang, crossed the Yangtze River and approached the Chen capital Jiankang. Soon, after Heruo defeated the Chen general Xiao Mohe, Jiankang fell, and the Chen emperor Chen Shubao was captured. Yang Guang, apparently fascinated by Chen Shubao's favorite concubine Consort Zhang Lihua, sent Gao Jiong's son Gao Dehong (高德弘) to order Gao Jiong to hold Consort Zhang. Instead, Gao Jiong, comparing Consort Zhang to Daji (the wicked wife of King Zhou of Shang), beheaded her. Yang Guang thereafter resented Gao greatly, stating sarcastically, "It has been said, 'You should repay every good deed done to you.' I will repay Duke Gao later." By Yang Guang's orders, several of Chen Shubao's favorite officials, who were considered reasons for Chen's downfall, including Shi Wenqing (施文慶), Shen Keqing (沈客卿), Yang Huilang (陽慧朗), Xu Xi (徐析), and Ji Huijing (暨慧景), were executed. It was said that the people praised Yang Guang for his actions. Chen Shubao and his own clan members, however, were treated with kindness, and at Yang Guang's request, Chen Shubao sent letters to Chen generals who had not yet surrendered to persuade them to do so, and they largely did. Later that year, Yang Guang's forces escorted them to the capital Chang'an. At the ceremony to present Chen Shubao to Emperor Wen, Yang Guang marched into the palace first, and Emperor Wen bestowed on Yang Guang decorated wagons, horses, clothing, and jade. Afterwards, Yang Jun was given the Yang Province (then moved to modern Yangzhou, Jiangsu) commandant post, and Yang Guang was returned to Bing Province. In 590, Emperor Wen swapped the defense posts of Yang Jun and Yang Guang, returning Yang Guang to Yang Province.
In 594, Yang Guang urged Emperor Wen to offer sacrifices to Mount Tai—a traditional ceremony for emperors, but one that was rarely carried out. Emperor Wen rejected the elaborate traditional ceremonies, but did carry out a reduced ceremony at Mount Tai.
In spring 600, with Ashina Dianjue, who had by now become Tujue's khan, attacking the borders, Emperor Wen sent Yang Guang, Yang Su the Duke of Yue, Yang Guang's brother Yang Liang the Prince of Han, and Shi Wansui (史萬歲) the Duke of Taiping, against Tujue, and they were largely successful against Ashina Dianjue, protecting the Qimin Khan Ashina Rangan, whom Sui supported, from Ashina Dianjue's attack.
By 600, Yang Guang's older brother Yang Yong had lost the favors of Emperor Wen and Empress Dugu—over his wastefulness (which displeased Emperor Wen) and his having many concubines (which displeased Empress Dugu). Yang Guang, by contrast, pretended to be frugal and loving only Princess Xiao. (It was written that Yang Guang did have concubines, but he pretended that he did not, and that he forced his concubines to have abortions if they became pregnant.) Yang Guang further inflamed Empress Dugu by informing her that she believed that Yang Yong was determined to kill him eventually. Empress Yang thus resolved to remove Yang Yong. Yang Guang further had his associate Yuwen Shu persuade Yang Su's brother Yang Yue (楊約) that, because Yang Su's relationship with Yang Yong was not good, that their family would be in peril should Yang Yong succeed Emperor Wen. Finally, Yang Guang also had Yang Yong's associate Ji Wei (姬威) accuse Yang Yong of plotting treason. Emperor Wen had Yang Su investigate, and Yang Guang and Yang Su manufactured evidence against Yang Yong. Emperor Wen deposed Yang Yong and replaced him with Yang Guang, putting Yang Yong under house arrest under Yang Guang's watch. Yang Guang later prevented Yang Yong from all attempts of seeing his parents again.Early reign
An immediate challenge that Emperor Yang faced was a rebellion by his brother Yang Liang, then the commandant at Bing Province, who was encouraged by the generals Wang Kui (王頍) and Xiao Mohe. Yang Liang received support from 19 provinces, but lacked a coherent plan as to whether to try to challenge Emperor Yang for the control of the entire empire, or just the region north of the Yellow River. After some initial successes, Yang Liang's offenses stalled. Emperor Yang sent Yang Su against him, and Yang Su proceeded quickly to Yang Liang's headquarters at Bing Province, capturing Xiao and forcing Yang Liang to surrender. Emperor Yang did not execute Yang Liang, but reduced him to commoner rank and imprisoned him for the rest of his life.
In winter 604, believing in the words of the sorcerer Zhangchou Taiyi (章仇太翼) that the geography of Chang'an was not conducive to his health, Emperor Yang went to Luoyang, designating it as the eastern capital, and would rarely return to Chang'an thereafter. He ordered that major construction projects be carried out at Luoyang, commensurate with the necessities of having it as the actual capital, and he left his oldest son, Yang Zhao the Prince of Jin, in charge of Chang'an. He conscripted several hundred thousands of young men to dig a lengthy trench to surround the Luoyang region, intending that it serve as a defense perimeter. He also ordered that women and servants be exempted from head taxes, and that men would only be considered adults (i.e., subject to conscription) when they turn 21.
In spring 605, Emperor Yang created his wife Crown Princess Xiao empress, and Yang Zhao as crown prince. He also abolished the offices of military commandants. He, at this time, trusted Empress Xiao's brother Xiao Cong the Duke of Ju (Western Liang's last emperor) and made him, as well as many of her other relatives, important officials, creating him the greater title of Duke of Liang.
Starting in 605, Emperor Yang also started a massive number of construction projects—including the building of the imperial palace at Luoyang, described to be particularly luxurious. Further, he conscripted a large number of men to build the Tongji Canal (通濟渠), connecting Luoyang with the Yellow River and connecting the Yellow River with the Huai River, as well as to rebuild the Han Canal (邗溝), connecting the Huai River and the Yangtze River. The two canals, which would eventually become parts of the Grand Canal of China, were said to be constructed within five months, but at substantial cost of life—40% to 50% of the men employed. Emperor Yang also ordered that some 40 secondary palaces be built around the empire, so that he could visit the various provinces, arguing that he needed to do so to see the conditions of the empire so that he could govern effectively.
In fall 605, after the completion of the Tongji and Han Canals, Emperor Yang carried out the first of 11 (counting military campaigns) tours that he would eventually undertake of various parts of the empire, going to Jiangdu—the capital of Yang Province, where he had been commandant previously—on an imperial ship that was said to be sufficiently large and luxurious to serve as floating palaces.
Also in 605, when Khitan tribes attacked Ying Province (營州, roughly modern Zhaoyang, Liaoning), Emperor Yang had the official Wei Yunqi (韋雲起) requisition Tujue troops under Ashina Rangan to attack Khitan. The Khitan forces were caught by surprise and defeated.
In summer 606, Yang Zhao the Crown Prince became ill while visiting Luoyang, and soon died. Emperor Yang would not create another crown prince for the rest of his reign, creating Yang Zhao's sons Yang Tan (楊倓), Yang Tong, and Yang You imperial princes, while initially apparently tacitly considering his second son, Yang Jian the Prince of Qi (note different character than Emperor Wen) the de facto successor, leaving Yang Jian in charge of Luoyang whenever he would be away from Luoyang. Yang Su, whom Emperor Yang pretended to respect but actually feared, also died in summer 606.
Also in 606, Emperor Yang ordered that two massive food storages—the Luokou Storage (洛口倉) and the Huiluo Storage (回洛倉) – be constructed near Luoyang.
In spring 607, Ashina Rangan visited Emperor Yang at Luoyang. Also in spring 607, at the instigation of Yuwen Shu, Emperor Yang had Yang Yong's eight sons put to death.
In summer 607, Emperor Yang abolished provinces and changed them to commanderies. At the same time, he reorganized his father's governmental system of having five main bureaus, keeping four of the main bureaus—the executive bureau (尚書省, Shangshu Sheng), the examination bureau (門下省, Menxia Sheng), the legislative bureau (內史省, Neishi Sheng), the Palace Library – while abolishing the eunuch bureau and replacing it with the palace bureau (殿內省, Diannei Sheng). He established three additional independent agencies and five independent departments. He also organized the imperial army into 16 corps. He abolished three levels of noble titles—the counts, the viscounts, and the barons—keeping only the princes, the dukes, and the marquesses.
Also in summer 607, Emperor Yang embarked on a tour of the northern provinces, building an imperial highway from Chang'an to Jinyang (晉陽, the capital of Bing Province). He then personally visited the imperial tent of Ashina Rangan, whose display of submission and loyalty caused Emperor Yang to bestow much honor and wealth on him. When the senior officials Gao Jiong, Yuwen Bi (宇文弼), and Heruo Bi privately expressed disapproval, Emperor Yang discovered their criticism and put all of them to death, while removing Su Wei, who also discouraged him from giving excessive rewards to Ashina Rangan, from his post. (Traditional historians attribute Gao's death to Gao's refusal to keep Chen Shubao's Consort Zhang alive in 589.) As Xiao Cong had a deep friendship with Heruo Bi, and there had been rumors that the Xiaos would rise again, the superstitious Emperor Yang also removed Xiao Cong from his post. Qimin visited Yangdi at Yulin.Also in 607, at the instigation of Pei Ju, Emperor Yang reopened relations with Xiyu states.
In spring 608, Emperor Yang conscripted over a million men to construct the Yongji Canal (永濟渠), from the Yellow River to Zhuo Commandery (涿郡, roughly modern Beijing). It was said that there were not enough men, and he started conscripting women as well.
In 608, after persuasion by the Sui official Cui Junsu (崔君肅), the Western Tujue khan (Ashina Rangan's western rival), the Heshana Khan Ashina Daman, whose mother was Han, submitted to Sui as a vassal. However, also in 608, Emperor Yang received a letter claiming to be from the Emperor of Japan, Duolisibigu (多利思比孤, now commonly believed to be Prince Shōtoku), stating, "The Son of Heaven where the sun rises, to the Son of Heaven where the sun sets, may good health be with you." Displeased by what he saw as insolence, he ordered that in the future, "insolent" letters from other states not be submitted to him.
Also in 608, initially over disputes over women (Yang Jian's having taken a concubine that Emperor Yang himself wanted) and hunting (Yang Jian's guards having been much more successful than Emperor Yang's guards at hunting), Emperor Yang's relationship with Yang Jian began to deteriorate. He ordered investigations into Yang Jian's violation of laws, and discovered that Yang Jian had used witchcraft to curse Yang Zhao's three sons. In anger, Emperor Yang executed and exiled a number of Yang Jian's associates, but he did not depose Yang Jian, although from this point on Yang Jian did not exert much influence on the political scene.
In 608 as well, Pei Ju persuaded the Tiele tribes to attack Tuyuhun, forcing Tuyuhun's Busabuo Khan Murong Fuyun to flee. Murong Fuyun initially considered submitting to Sui, and Emperor Yang sent Yuwen with an army to welcome him. However, when Murong Fuyun changed his mind, Yuwen attacked him and seized much of Tuyuhun's people. When Murong Fuyun fled further, Emperor Yang had his forces seize Tuyuhun's territory, establishing four commanderies, to be populated with exiles.Family
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