Wang Anshi in the context of "Chinese Legalism"

The Song dynasty (Chinese: 宋朝; pinyin: Sòng cháo; 960–1279) of China was an imperial dynasty that ruled most of China proper and southern China from the middle of the 10th century into the last quarter of the 13th century. The dynasty was established by Emperor Taizu of Song with his usurpation of the throne of Later Zhou, ending the Five Dynasties and Ten Kingdoms period.

The Song is considered a high point of classical Chinese innovation in science and technology, an era that featured prominent intellectual figures such as Shen Kuo and Su Song and the revolutionary use of gunpowder weapons. However, it was also a period of political and military turmoil, with opposing and often aggressive political factions formed at court that impeded political, social, and economic progress. The frontier management policies of the Chancellor Wang Anshi exacerbated hostile conditions along the Chinese-Vietnamese border. This sparked a border war with Vietnam's Lý dynasty, which was fought to a mutual draw and concluded with a peace treaty in 1082. To the northwest the Song Empire frequently fought battles with the Tangut-led Western Xia dynasty, as well as the Khitan-led Liao dynasty to the north.

Shen Kuo (Chinese: 沈括; 1031–1095) or Shen Gua, courtesy name Cunzhong (存中) and pseudonym Mengqi (now usually given as Mengxi) Weng (夢溪翁), was a Chinese polymath, scientist, and statesman of the Song dynasty (960–1279). Shen was a master in many fields of study including mathematics, optics, and horology. In his career as a civil servant, he became a finance minister, governmental state inspector, head official for the Bureau of Astronomy in the Song court, Assistant Minister of Imperial Hospitality, and also served as an academic chancellor. At court his political allegiance was to the Reformist faction known as the New Policies Group, headed by Chancellor Wang Anshi (1021–1085).

In his Dream Pool Essays or Dream Torrent Essays (夢溪筆談; Mengxi Bitan) of 1088, Shen was the first to describe the magnetic needle compass, which would be used for navigation (first described in Europe by Alexander Neckam in 1187). Shen discovered the concept of true north in terms of magnetic declination towards the north pole, with experimentation of suspended magnetic needles and "the improved meridian determined by Shen's [astronomical] measurement of the distance between the pole star and true north". This was the decisive step in human history to make compasses more useful for navigation, and may have been a concept unknown in Europe for another four hundred years (evidence of German sundials made circa 1450 show markings similar to Chinese geomancers' compasses in regard to declination).

Sima Guang (17 November 1019 – 11 October 1086), courtesy name Junshi, was a Chinese historian, politician, and writer. He was a high-ranking Song dynasty scholar-official who authored the Zizhi Tongjian, a monumental work of history.

Born into a family of officials, Sima Guang displayed remarkable intelligence from a young age and quickly rose through the ranks of the Song bureaucracy. His early career was marked by his work in government administration, where he gained a reputation for his meticulous scholarship and principled stance on state affairs. As a prominent official, he strongly opposed Wang Anshi’s New Policies, arguing that they disrupted social stability and traditional governance. His criticisms led to his removal from political office when reformists held power.

The New Policies (Chinese: 新法; pinyin: xīnfǎ), also known as Xining Reforms (熙寧變法; Xining being the first era name used by Emperor Shenzong), Xifeng Reforms (熙豐變法; Xifeng being the portmanteau of the two era names used by Emperor Shenzong, Xining and Yuanfeng) or Wang Anshi Reforms (王安石變法), were a series of reforms initiated by the Northern Song dynasty politician Wang Anshi when he served as minister under Emperor Shenzong from 1069–1076. The policies were in force until the emperor's death, then repealed, then enacted again and were a focus of court politics until the end of the Northern Song. In some ways, it continued the policies of the aborted Qingli Reforms from two decades earlier.