WORLD HISTORY

Detailed explanation-1: -The Sui dynasty (581–618), which reunified China after nearly four centuries of political fragmentation during which the north and south had developed in different ways, played a part far more important than its short span would suggest.

Detailed explanation-2: -After gaining control of northern China, Emperor Wen gathered a massive army and invaded the south. Eight years later, in 589, he conquered southern China and brought all of China under the rule of the Sui Dynasty.

Detailed explanation-3: -The dynasty, which lasted only thirty-seven years, was undermined by ambitious wars and construction projects, which overstretched its resources. Particularly, under Emperor Yang, heavy taxation and compulsory labor duties would eventually induce widespread revolts and brief civil war following the fall of the dynasty.

Detailed explanation-4: -Yang Jian of the Sui dynasty was responsible for reunifying China after the Period of Disunion.

Detailed explanation-5: -Song dynasty, Wade-Giles romanization Sung, (960–1279), Chinese dynasty that ruled the country during one of its most brilliant cultural epochs. It is commonly divided into Bei (Northern) and Nan (Southern) Song periods, as the dynasty ruled only in South China after 1127.