Sui Dynasty

隋朝 (Suí Cháo)

581-618 CECapital: Daxing (Chang'an), Luoyang (eastern capital from 605)

Founded by Yang Jian, Emperor Wen (隋文帝 Suí Wéndì)

The Sui dynasty (581-618 CE) was the short-lived dynasty that reunified China in 589 after nearly three centuries of division between north and south. Founded by Yang Jian (Emperor Wen), it built the Grand Canal and the capital of Daxing, reformed the law and administration, and collapsed under the costs of Emperor Yang's canal works and failed campaigns against Goguryeo, leaving its institutions to the Tang.

Overview & Significance

The Sui is often compared to the Qin: a brief, hard-driving dynasty that did the work of unification and left a longer-lived successor to enjoy it. Its achievements were real and durable. The reunification of 589 ended the north-south division that had lasted since the early fourth century, and China was never again partitioned along that line for so long. The Kaihuang Code, the Three Departments and Six Ministries, the two-tier local administration, the rule of avoidance and the early examination degrees were all taken over by the Tang with little change. The Grand Canal tied the rice economy of the Yangzi delta to the political centre in the north, a link that shaped the geography of Chinese power until the railway age. Daxing became Tang Chang'an, the largest city in the world in the eighth century, and its plan was copied in Japan. Sui patronage made Buddhism a state-supported religion of the whole empire. The dynasty's failure lay in pace rather than direction: it attempted in three decades what required a century.

Key Emperors

Emperor Wen (Yang Jian)

Reign: 581-604 CE

Took the throne from his grandson, the child emperor of the Northern Zhou, and founded the Sui in 581
Conquered the southern Chen dynasty in 589, reuniting China for the first time since 316
Promulgated the Kaihuang Code (581-583), a simplified penal law that became the model for the Tang Code
Abolished the commandery level of local government and appointed all county officials from the centre
Founded the planned capital of Daxing, laid out by the architect Yuwen Kai in 582

Emperor Yang (Yang Guang)

Reign: 604-618 CE

Rebuilt Luoyang as an eastern capital and linked the Yellow River, Huai and Yangzi by canal (605-610)
Extended the Great Wall and opened routes to the Western Regions, receiving envoys at Zhangye in 609
Expanded the examination system with a jinshi degree, traditionally dated to 605
Launched three campaigns against Goguryeo (612-614) that exhausted the empire and provoked rebellion

Emperor Gong (Yang You)

Reign: 617-618 CE

Grandson of Emperor Yang, installed at Daxing as a figurehead by Li Yuan in late 617
Reigned while Emperor Yang, still alive at Jiangdu, was demoted to 'retired emperor'
Abdicated to Li Yuan in June 618 after news of Emperor Yang's assassination reached the capital
His abdication gave the Tang founding a formal appearance of legitimacy

Timeline

Yang Jian deposes the last Northern Zhou emperor and proclaims the Sui

581 CE

A northern general founded a dynasty that would end the division of China

Impact: Yang Jian purged the Northern Zhou imperial clan and took the era name Kaihuang

Construction of the new capital Daxing south-east of the ruined Han Chang'an

582-583 CE

A planned, walled city on a grid, designed by Yuwen Kai

Impact: Reused by the Tang as Chang'an and imitated by Nara and Heian in Japan

Sui diplomacy splits the Turkic khaganate into eastern and western halves

583 CE

Removed the main threat on the northern frontier

Impact: Freed resources for the conquest of the south

Sui armies capture Jiankang and the Chen emperor; China is reunified

589 CE

End of the Northern and Southern Dynasties

Impact: Restored a single Chinese empire from the Great Wall to the Red River

Emperor Wen distributes Buddhist relics to stupas in over a hundred prefectures

601-604 CE

Buddhism used as a shared faith to bind north and south

Impact: Set a pattern of imperial patronage continued by the Tang

Emperor Wen dies; his second son Yang Guang becomes Emperor Yang

604 CE

Later histories accuse Yang Guang of murdering his father, a charge that cannot be verified

Impact: The new emperor began an ambitious programme of construction and expansion

Work begins on the eastern capital at Luoyang and on the Tongji Canal to the Huai

605 CE

Start of the Grand Canal system

Impact: Millions of conscripted labourers were mobilised; the canal was completed in months

Yongji Canal to the north and Jiangnan Canal to Hangzhou completed

608-610 CE

Linked the Yangzi delta, the Yellow River plain and the north-eastern frontier

Impact: Provided the logistical spine for the Tang and every later dynasty

Emperor Yang tours the Hexi Corridor and receives rulers of the Western Regions at Zhangye

609 CE

Reasserted Chinese influence over the trade routes to Central Asia

Impact: Prepared the ground for Tang expansion into the Tarim Basin

First campaign against Goguryeo; the Sui army is destroyed at the Salsu River

612 CE

An army said to number over a million men failed to take the Korean fortresses

Impact: Losses, conscription and requisitions caused the first popular revolts

Second Goguryeo campaign abandoned when the minister Yang Xuangan rebels near Luoyang

613 CE

Rebellion reached the ruling elite

Impact: The revolt was crushed, but uprisings spread across Shandong and Hebei

Eastern Turks besiege Emperor Yang at Yanmen

615 CE

The Turks had recovered and the emperor narrowly escaped capture

Impact: Emperor Yang withdrew to Jiangdu (Yangzhou) in 616 and abandoned the north

Li Yuan, garrison commander at Taiyuan, marches on Daxing and installs Yang You as Emperor Gong

617 CE

The founder of the Tang seized the capital while claiming to serve the Sui

Impact: Rival rebels Li Mi, Dou Jiande and Wang Shichong controlled the rest of the north

Emperor Yang strangled at Jiangdu by his general Yuwen Huaji; Li Yuan proclaims the Tang

618 CE

End of the Sui

Impact: The Tang inherited the Sui capital, canal, law code and administration almost intact

Achievements

political

Reunified China after the Northern and Southern Dynasties, ending 273 years of division
Simplified local government to two tiers (prefecture and county) with officials appointed centrally and barred from serving in their home districts
Introduced the 'rule of avoidance' and a three-year rotation for local officials, both kept by later dynasties
Reorganised the central government into the Three Departments and Six Ministries that the Tang made permanent
Compiled a national census that reported about 8.9 million households in 609

cultural

Promoted Buddhism as a unifying faith; Emperor Wen distributed relics to stupas across the empire in 601-604
Sponsored the collection of books lost during the wars; the imperial library at Luoyang held tens of thousands of scrolls
Blended northern and southern literary and musical traditions at a single court
Lu Fayan's Qieyun rhyme dictionary of 601 recorded the pronunciation used by educated speakers

technological

Grand Canal: the Tongji Canal (605), Yongji Canal (608) and Jiangnan Canal (610) created a waterway of over 2,000 km from Hangzhou to the Beijing area
The Anji Bridge at Zhaozhou (c. 605-616), built by Li Chun, is the world's oldest surviving open-spandrel stone arch bridge
Daxing, at roughly 84 square kilometres inside its walls, was the largest planned city of its time
Large state granaries such as Luokou and Huiluo near Luoyang stored grain moved by canal

military

Defeated the Chen in a combined river and land campaign of 588-589 involving half a million men
Split the Turkic khaganate by diplomacy in 583, creating separate Eastern and Western Turks
Campaigned against the Tuyuhun in 608-609 and annexed the Qinghai region
Maintained the fubing militia system of the Northern Zhou, later the core of the Tang army

economic

Restored the equal-field system, allotting land to adult males in return for tax and service
Standardised coinage and weights and measures across north and south
Canal transport moved southern grain and tax goods to the northern capitals
Relief granaries (yicang) established in 585 stored surplus against famine

religious

Emperor Wen, raised by a Buddhist nun, declared himself a patron of the faith and lifted Northern Zhou restrictions
The Tiantai school under Zhiyi (538-597) gained imperial support from the future Emperor Yang
Daoism and Confucian ritual were also patronised as instruments of unity

Artifacts & Archaeological Evidence

Anji Bridge (安济桥), Zhaoxian, Hebei

Segmental stone arch bridge with open spandrels, 50.8 m long, built by Li Chun between about 605 and 616

Significance: The oldest surviving bridge of its type in the world and a landmark of Chinese engineering

Grand Canal (大运河)

Network of canals joining the Hai, Yellow, Huai, Yangzi and Qiantang rivers, largely dug in 605-610 and later re-routed by the Yuan

Significance: The largest pre-modern engineering work in China and a UNESCO World Heritage Site since 2014

Tomb of Li Jingxun (李静训), Xi'an

Undisturbed burial of a nine-year-old aristocratic girl dated 608, with a gold and pearl necklace, glass, porcelain and a stone sarcophagus in the form of a house

Significance: Shows the wealth of the Sui court and its links with Central Asian craft traditions

Sui Buddhist altarpieces and stone sculpture

Gilt-bronze altar groups and stone Bodhisattvas, such as the dated altarpiece of 593 in the Metropolitan Museum, that blend northern and southern styles

Significance: Document the transition from Northern Qi and Zhou sculpture to the mature Tang style

Qieyun rhyme dictionary (切韵)

Lu Fayan's dictionary of 601, arranged by tone and rhyme, surviving in Tang copies and expansions

Significance: The primary source for reconstructing the pronunciation of Middle Chinese

Fall of the Dynasty

Emperor Yang's projects were carried out simultaneously and at great cost. The new capital at Luoyang, the canals, the Great Wall extension of 607-608 and the palace complexes required millions of conscripts, and contemporary records claim that a large share of the workers on the Yongji Canal died. Three campaigns against Goguryeo between 612 and 614 mobilised the largest armies of the age and failed each time, while the requisition of grain, carts and men fell on the very regions of Shandong and Hebei already burdened by flooding of the Yellow River in 611. Revolts began in 611 and spread after the humiliation at Yanmen in 615. The emperor withdrew to Jiangdu in the south and lost contact with events in the north, where Li Yuan took the capital in 617. In the spring of 618 Emperor Yang was killed by his own bodyguard under Yuwen Huaji. Li Yuan then accepted the abdication of the puppet Emperor Gong and founded the Tang; a last Sui claimant at Luoyang was deposed in 619.