Sui dynasty

Chinese ruling family 581-618 which reunited China after the strife of the Three Kingdoms era. There were two Sui emperors: Yang Qien (Yang Chien, 541-604), and Yangdi (Yang-ti, ruled 605-17). Though short-lived, the Sui re-established strong centralized government, rebuilding the Great Wall and digging canals which later formed part of the Grand Canal system. The Sui capital was Chang'an.