After King Wu of Zhou overthrew the last ruler of Shang, marking the transition to the Zhou dynasty, the victor was honor-bound by a stricture of feudal etiquette known as Er Wang San Ke [zh] to allow the defeated house of Shang to continue offering sacrifices to their ancestors.
In 355, Dai Ticheng (戴剔成), a distant relative of the ruling royal line and once a minister of Duke Huan II, managed to usurp the throne.
Qin, which had been an ally of Song, refused to intervene for strategic and diplomatic reasons after being convinced by Su Dai from Wei.
The philosopher Mozi references this state in the chapter "Obvious Existence of Ghosts", in which he mentions a number of Spring and Autumn Annals, including those of the Zhou, Yan, and Qi.
Song is represented by the star Eta Ophiuchi in the asterism Left Wall, Heavenly Market enclosure (see Chinese constellation).