How was Sui Dynasty established?
In the Northern Zhou Dynasty, during the previous rule of Emperor Xuan, the ruling group of split internally. State politics were in disorder. People were suffering in their lives, and social contradictions were intensified. In order to reform the unstable society, generals of the Han people seized the opportunity to take over the regime leaded by Yang Jian. In 580, Emperor Xuan died of an illness, and Emperor Jing, only eight years old then inherited the throne. Yang Jian assisted the young emperor as his Prime Minister and controlled the military power of the Northern Zhou. In 581, Yang Jian dethroned Emperor Jing, and established the Sui Dynasty. Eight years after ascending to the throne, Yang Jian destroyed the Chen Dynasty in southern China, and reunified China.
