SECUREwww.britannica.com/topic/Song-dynasty
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. The Bei Song was founded by Zhao Kuangyin, the military inspector general of the Hou (Later) Zhou dynasty (last …