Refers to a Chinese dynastic style and period dating to 960 to 1279 CE. It was a time of social, economic, and artistic invention and transition; in particular, an unsurpassed refinement was achieved in many of the arts. As society shifted away from being one of aristocrats towards one of meritorious commoners, the ruling class sought to shore up their power. There are two divisions within this style and period: Northern Sung, dating to 960 to 1127, and Southern Sung, dating to 1127 to 1279.——艺术与建筑索引典

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.——Britannica Academic  @en