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The Sui dynasty ( ) was a Chinese imperial dynasty that ruled from 581 to 618. The re-unification of China proper under the Sui brought the Northern and Southern dynasties era to a close, ending a prolonged period of political division since the War of the Eight Princes. The Sui endeavoured to rebuild the country, re-establishing and reforming many imperial institutions; in so doing, the Sui laid much of the foundation for the subsequent Tang dynasty, who after toppling the Sui would ultimately preside over a new golden age in Chinese history. Often compared to the Qin dynasty (221–206 BC), the Sui likewise unified China after a prolonged period of division, undertook wide-ranging reforms and construction projects to consolidate state power, and collapsed after a brief period.
The dynasty was founded by Yang Jian (Emperor Wen), who had been a member of the military aristocracy that had developed in the northwest during the prolonged period of division. The Sui capital was initially based in Daxing (Chang'an, modern Xi'an), but later moved to Luoyang in 605, which had been re-founded as a planned city. Wen and his successor Emperor Yang undertook various centralising reforms, most notably among them the equal-field system that aimed to reduce economic inequality and improve agricultural productivity, the system, which preceded the Three Departments and Six Ministries system, and the standardisation and re-unification of the coinage. The Sui also encouraged the spread of Buddhism throughout the empire. By the dynasty's mid-point, the state experienced considerable prosperity, enjoying a vast agricultural surplus that supported rapid population growth.
The Sui engaged in many construction mega-projects, including the Grand Canal, the extension of the Great Wall, and the reconstruction of Luoyang.CIHoCn, p. 114: "dug between 605 and 609 by means of enormous levies of conscripted labor". The canal linked Luoyang in the east with Chang'an in the west, with the eastern economic and agricultural centres towards Jiangdu (now Yangzhou, Jiangsu) and Yuhang (now Hangzhou), and with the northern frontiers (near modern Beijing). While the initial motivations of the canal were improving grain shipments to the capital and military logistics—including the Troopship—the new, reliable inland route would ultimately facilitate domestic trade, the flow of people, and cultural exchange for centuries. These mega-projects were led by an efficient centralised bureaucracy, but forcibly conscripted millions of workers at a heavy human cost.
After a series of military campaigns against Goguryeo on the Korean peninsula, ended in defeat by 614, the dynasty disintegrated amid popular revolts that culminated in the assassination of Emperor Yang by a minister named Yuwen Huaji in 618. The dynasty, which lasted only 37 years, was undermined by ambitious wars and construction projects, which overstretched its resources. Particularly, under Emperor Yang, heavy taxation and compulsory labour duties would eventually induce widespread revolts and brief civil war following the fall of the dynasty.
In his campaign for southern conquest, Emperor Wen assembled thousands of boats to confront the naval forces of the Chen dynasty on the Yangtze. The largest of these ships were very tall, having five layered decks and the capacity for 800 non-crew personnel. They were outfitted with six 50-foot-long booms that were used to swing and damage enemy ships, or to pin them down so that Sui marine troops could use act-and-board techniques. Besides employing Xianbei and other Chinese ethnic groups for the fight against Chen, Emperor Wen also employed the service of people from southeastern Sichuan, which Sui had recently conquered.
In 588, the Sui had amassed 518,000 troops along the northern bank of the Yangtze River, stretching from Sichuan to the East China Sea. Zizhi Tongjian, vol. 176. The Chen dynasty could not withstand such an assault. By 589, Sui troops entered Jiankang (now Nanjing) and the last emperor of Chen surrendered. The city was razed to the ground, while Sui troops escorted Chen nobles back north, where the northern aristocrats became fascinated with everything the south had to provide culturally and intellectually.
Although Emperor Wen was famous for bankrupting the state treasury with warfare and construction projects, he made many improvements to infrastructure during his early reign. He established granaries as sources of food and as a means to regulate market prices from the taxation of crops, much like the earlier Han dynasty. The large agricultural surplus supported rapid growth of population to a historical peak, which was only surpassed during the reign of Emperor Xuanzong of Tang more than a century later.
The capital of Daxing (Chang'an, modern Xi'an), while situated in the militarily secure heartland of Guanzhong, was remote from the economic centres to the east and south of the empire. Emperor Wen initiated the construction of the Grand Canal, with completion of the first (and the shortest) route that directly linked Chang'an to the Yellow River. Later, Emperor Yang enormously enlarged the scale of the Grand Canal construction.
Externally, the emerging Turkic Khaganate in the north posed a major threat to the newly founded dynasty. With Emperor Wen's diplomatic manoeuvre, the Khaganate split into Eastern and Western halves. Later the Great Wall was consolidated to further secure the northern territory. In Emperor Wen's late years, the first war with Goguryeo, ended with defeat. Nevertheless, the celebrated "Reign of Kaihuang" (era name of Emperor Wen) was considered by historians as one of the apexes in the two millennium imperial period of Chinese history.
The Sui emperors were from the northwest military aristocracy, and they cited the Han clan as their ancestors. They emphasised their Han ancestry, and claimed descent from the Han official Yang Zhen. The New Book of Tang traces their patrilineal ancestry to the Zhou dynasty kings via the Dukes of Jin. New Book of Tang, s:新唐書 The Li of Zhaojun and the Lu of Fanyang hailed from Shandong and were related to the Liu clan, which was also linked to the Hongnong Yangshi of and other clans of Guanlong.
The Yang of Hongnong, Jia of Hedong, Xiang of Henei, and Wang of Taiyuan from the Tang dynasty were later claimed as ancestors by Song dynasty lineages. Information about these major political events in China were somehow filtered west and reached the Byzantine Empire, the continuation of the Roman Empire in the east. From Turkic peoples of Central Asia the Eastern Romans derived a new name for China after the older Sinae and Serica: Taugast (Old Turkic: Tabghach), during its Northern Wei (386–535) period.Luttwak, Edward N. (2009). The Grand Strategy of the Byzantine Empire. Cambridge and London: The Belknap Press of Harvard University Press. , p. 168. The 7th-century Byzantine historian Theophylact Simocatta wrote a generally accurate depiction of the reunification of China by Emperor Wen of the Sui dynasty, with the conquest of the rival Chen dynasty in southern China. Simocatta correctly placed these events within the reign period of Byzantine ruler Maurice. Simocatta also provided cursory information about the geography of China, its division by the Yangzi River and its capital Khubdan (from Old Turkic Khumdan, i.e. Chang'an) along with its Chinese culture, deeming its people "idolatrous" but wise in governance. He noted that the ruler was named "Taisson", which he claimed meant "Son of God", perhaps Chinese Tianzi (Son of Heaven) or even the name of the contemporary ruler Emperor Taizong of Tang.
Both Emperors Yang and Wen sent military expeditions into Vietnam as Annam in northern Vietnam had been incorporated into the Chinese empire over 600 years earlier during the Han dynasty (202 BC – 220 AD). However the Kingdom of Champa in central Vietnam became a major counterpart to Chinese invasions to its north. According to Ebrey, Walthall, and Palais, these invasions became known as the Linyi-Champa Campaign (602–605). (2025). 9780618133840, Houghton Mifflin Harcourt. ISBN 9780618133840
The Hanoi area formerly held by the Han and Jin dynasties was easily retaken from the Early Lý dynasty ruler Lý Phật Tử in 602. A few years later the Sui army pushed farther south and was attacked by troops on from Champa in southern Vietnam. The Sui army feigned retreat and dug pits to trap the elephants, lured the Champan troops to attack then used crossbows against the elephants causing them to turn around and trample their own soldiers. Although Sui troops were victorious many succumbed to disease as northern soldiers did not have immunity to such as malaria.
Although the Sui dynasty was relatively short (581–618), much was accomplished during its tenure. The Grand Canal was one of the main accomplishments. It was extended north from the Hangzhou region across the Yangtze to Yangzhou, and then northwest to the region of Luoyang. Again, like the Great Wall works, the massive conscription of labour and allocation of resources for the Grand Canal project resulted in challenges for Sui dynastic continuity. The eventual fall of the Sui dynasty was also due to the many losses caused by the failed military campaigns against Goguryeo. It was after these defeats and losses that the country was left in ruins and rebels soon took control of the government. Emperor Yang was assassinated in 618. He had gone South after the capital being threatened by various rebel groups and was killed by his Yuwen clan advisors. Meanwhile, in the North, the aristocrat Li Yuan (李淵) held an uprising after which he ended up ascending the throne to become Emperor Gaozu of Tang.
There were Dukedoms for the offspring of the royal families of the Zhou dynasty, Sui dynasty, and Tang dynasty in the Later Jin (Five Dynasties). This practice was referred to as (二王三恪).
Rituals and sacrifices were conducted by the Sui.
While early Buddhist teachings were acquired from Sanskrit , it was during the late Six dynasties and Sui dynasty that local Chinese schools of Buddhist thoughts started to flourish. Most notably, Zhiyi founded the Tiantai school, and completed the Mohe Zhiguan, within which he taught the principle of "Three Thousand Realms in a Single moment of Life" as the essence of Buddhist teaching outlined in the Lotus Sutra.
Emperor Wen and his empress had converted to Buddhism to legitimise imperial authority over China and the conquest of Chen. The emperor presented himself as a Cakravartin king, a Buddhist monarch who would use military force to defend the Buddhist faith. In the year 601 AD, Emperor Wen had relics of the Buddha distributed to temples throughout China, with edicts that expressed his goals, "all the people within the Four Seas may, without exception, develop enlightenment and together cultivate fortunate karma, bringing it to pass that present existences will lead to happy future lives, that the sustained creation of good causation will carry us one and all up to wondrous enlightenment". (2025). 9780618133840, Houghton Mifflin Harcourt. ISBN 9780618133840 Ultimately, this act was an imitation of Ashoka, a ruler of the ancient Maurya Empire in India.
| Era name |
| Kāihuáng (開皇) 581–600 Rénshòu (仁壽) 601–604 |
| Dàyè (大業) 605–618 |
| Yìníng (義寧) 617–618 |
| Huángtài (皇泰) 618–619 |
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