Emperor Wen of Sui in the context of "Sui dynasty"

The Northern and Southern dynasties (Chinese: 南北朝; pinyin: Nán běi cháo) was a period of political division in the history of China that lasted from 420 to 589, following the tumultuous era of the Sixteen Kingdoms and the Eastern Jin dynasty. It is sometimes considered to be the latter part of a longer period known as the Six Dynasties (220–589). The period featured civil war and political chaos. However, it was also a time of flourishing arts and culture, advancement in technology, and the spread of Mahayana Buddhism and Taoism. The period saw large-scale migration of Han Chinese people to lands south of the Yangtze. It came to an end with the unification of China proper by Emperor Wen of the Sui dynasty in 589.

During this period, the process of sinicization accelerated among the non-Han ethnicities in the north and the indigenous peoples in the south. This process was also accompanied by the increasing popularity of Buddhism in both northern and southern China. Daoism gained influence as well, with two essential Daoist canons written during this period. Additionally, many notable technological advances occurred during this period. The invention of the stirrup during the earlier Jin dynasty (266–420) helped spur the development of heavy cavalry as a combat standard. Historians also note advances in medicine, astronomy, mathematics, and cartography. Intellectuals of the period include the mathematician and astronomer Zu Chongzhi (429–500), and astronomer Tao Hongjing (456–536).

Emperor Yang of Sui (Chinese: 隋煬帝, 569 – 11 April 618), personal name Yang Guang (楊廣), alternative name Ying (英), childhood name Amo (阿摩), Xianbei name Puliuru Guang (普六茹廣), was the second emperor of the Sui dynasty of China.

Emperor Yang's original name was Yang Ying, but he was renamed by his father Emperor Wen, after consulting with oracles, to Yang Guang. Yang Guang was made the Prince of Jin after Emperor Wen established the Sui dynasty in 581. In 588, he was granted command of the five armies that invaded the Chen dynasty in southern China and was widely praised for the success of this campaign. These military achievements, as well as his machinations against his older brother Yang Yong, led to him becoming crown prince in 600. After the death of his father in 604, generally considered, though unproven, by most traditional historians to be a murder ordered by Yang Guang, he ascended the Sui throne.

The Murong (Chinese: 慕容; pinyin: Mùróng; Wade–Giles: Mu-jung; LHC: *mɑ-joŋ; EMC: *mɔ-juawŋ) or Muren refers to an ethnic Xianbei tribe who are attested from the time of Tanshihuai (r. 156–181). Different strands of evidence exist linking the Murong to the Mongol nomadic confederation in Central Asia. The Former Yan (337–370), Later Yan (384–409), Western Yan (384–394), Southern Yan (398–410) dynasties as well as Tuyuhun (285–670) were all founded by Murong peoples.

Murong is also a surname, predominantly used by people of Xianbei descent. Prominent individuals who bear the surname include the Emperors and family of Former Yan and Later Yan, Murong Ke, Murong Long, Murong Sanzang (慕容三藏), Murong Yanzhao (慕容延钊), Murong Yanchao, Murong Nong, Murong Han, Murong Chuqiang (慕容楚强), Murong Haoran (慕容浩然), and the fictional character Murong Fu (慕容復). When Han peoples during the reign of Yuwen Tai were forced to change their surnames, Murong was one of three officially mandated Xianbei surnames. This policy was reversed by Emperor Wen of Sui, but some Han people retained the Murong surname.

Yang Yong (Chinese: 楊勇; died August 604), Xianbei name Xiandifa (睍地伐), also known by his posthumous title of Prince of Fangling (房陵王), was a crown prince of Sui dynasty. He was the oldest son of Emperor Wen and Empress Dugu. He drew ire from his parents for wastefulness (which Emperor Wen disliked) and having many concubines (which Empress Dugu disliked), while his younger brother, Yang Guang, whom Emperor Wen and Empress Dugu thought lacked these faults, was favored by them. In 600, Emperor Wen deposed Yang Yong and replaced him with Yang Guang. Subsequently, after Emperor Wen died on 13 August 604 (a death that most historians, while acknowledging a lack of conclusive evidence, believed to be a murder ordered by Yang Guang), Yang Guang had Yang Yong put to death.