(581–618) Short-lived Chinese dynasty that unified northern and southern China after centuries of division. Under the Sui, the cultural and artistic renaissance that was to reach its height under the succeeding Tang dynasty was set in motion. The first Sui emperor, Wendi, established uniform institutions of government throughout the country, promulgated a new legal system, conducted a census, recruited officials through examinations, and reestablished Confucian rituals. The Sui conducted three costly and unsuccessful campaigns against the Korean kingdom of Koguryo. The Sui capital at Chang'an was, in design, six times the size of the modern city of Xi'an at the same site.
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