The Sui dynasty (Chinese: 隋朝; pinyin: Suí cháo) was a short-lived imperial dynasty of China that lasted from 581 to 618. The Sui unified the Northern and Southern dynasties, thus ending the long period of division following the fall of the Western Jin dynasty, and laying the foundations for the much longer lasting Tang dynasty. Founded by Emperor Wen of Sui, the Sui dynasty capital was Chang'an (which was renamed Daxing, modern Xi'an, Shaanxi) from 581–605 and later Luoyang (605–18). Emperors Wen and his successor Yang undertook various centralized reforms, most notably the equal-field system, intended to reduce economic inequality and improve agricultural productivity; the institution of the Five Departments and Six Board (五省六曹 or 五省六部) system, which is a predecessor of Three Departments and Six Ministries system; and the standardization and re-unification of the coinage. They also spread and encouraged Buddhism throughout the empire. By the middle of the dynasty, the newly unified empire entered a golden age of prosperity with vast agricultural surplus that supported rapid population growth.

Sui dynasty - Wikipedia