Daji (Chinese: 妲己; pinyin: Dájǐ; Wade–Giles: Ta2-chi3), was the favorite consort of King Zhou of Shang, the last king of the Shang dynasty in ancient China. She is portrayed as a malevolent fox spirit in legends as well as novels. Her identification as a fox spirit seems to have originated from at least the Tang dynasty. These accounts have been popularized in works such as the Wu Wang Fa Zhou Pinghua (武王伐紂平話), the Fengshen Yanyi, and the Chronicles of the Eastern Zhou Kingdoms. She is considered a classic example of how a beauty causes the downfall of a dynasty in Chinese culture.
In the Song dynasty, fox spirit cults, including those dedicated to Daji, became outlawed, although their suppression proved unsuccessful. In 1111, an imperial edict was issued for the destruction of many spirit shrines within Kaifeng, including those of Daji.
Daji was from a noble family called Su (蘇) from the state of Yousu (有蘇). Hence, she is also known as Su Daji. In 1047 BC, King Zhou of Shang invaded Yousu and took Daji as his prize. In Feng Shen Yan Yi, she was a daughter of Su Hu (蘇護); in the early chapters, she was killed by a thousand-year-old vixen spirit who possessed her body before becoming a concubine of King Zhou.
King Zhou became extremely infatuated with Daji and started to neglect state affairs in order to keep her company. He used any means necessary to ingratiate himself with her and to please her. Daji liked animals so he built her a zoological Xanadu with several rare species of birds and animals. He also ordered artists to compose lewd music and choreograph bawdy dances to satisfy her musical taste. He gathered 3000 guests at one party to indulge in his "pond of wine" and "forest of meat". He allowed the guests to play a cat and mouse game nude in the forest to amuse Daji. When one of King Zhou's concubines, the daughter of Lord Jiu, protested, King Zhou had her executed. Her father was ground in pieces and his flesh fed to King Zhou's vassals.