The Sui Dynasty was a unified dynasty after more than 200 years of division between the Northern and Southern Dynasties. It was an important dynasty that inherited the Northern and Southern Dynasties and the Tang Dynasty downward, and historians often referred to it as the Sui and Tang Dynasties together with the Tang Dynasty. In 581 AD, Yang Jian usurped the Northern Zhou regime and established the Sui Dynasty, with the capital of Daxingcheng (now Xi'an). In 589, Chen was destroyed and unification was completed. At the beginning of the Sui Dynasty, it fought a war with the Turks, defeated the military threat of the Turks, and also unified the Qinghai region. Emperor Wen of Sui made great efforts to create the famous "rule of the emperor". Emperor Yang of the Sui Dynasty built Luoyang and dug the Grand Canal of the Sui and Tang Dynasties to communicate the north-south traffic. The imperial examination system was established and initially improved, and the system of six ministries in the three provinces also ran smoothly. In the later period, the reign was decaying, in 618 Li Yuan forced Emperor Gong of Sui to concede, and in 619, the Emperor Taizhu was forced to take the throne of Wang Shichong, the Sui Dynasty perished, and the country was in power for 38 years.
