Bi Gan; or Bigan; was a prominent Chinese figure during the last days of the Shang Dynasty; and played an important role in the Ming Dynasty novel 'Fengshen Yanyi'. Bi Gan was the son of King Wen Ding; and uncle to King Zhou of Shang; last of the Shang Dynasty.

King Zhou was infamous for his corruptive and cruel ways; especially after his betwitching by the fox spirit Su Daji; and became annoyed with Bi Gan's constant advice and attempts to rectify his ways. It is said that; on Daji's whisperings; King Zhou ordered Bi Gan to be executed through the extraction of his heart; under the pretext of curiosity on whether 'a good man's heart has seven openings'.

In 'Fengshen Yanyi'; Su Daji plots to kill Bi Gan after he kills some of her fellow fox spirits. The sage Jiang Ziya; predicting that Bi Gan will die soon; gives him a charm that will save his life. After his heart is removed; Bi Gan does not die immediately; and follows Jiang Ziya's instructions to go straight home without looking back. On the way home however; he is fooled by the malevolent spirit Pipa Jing to turn around; collapsing and then dying on the spot. Bi Gan was honoured by Confucius as 'one of the three men of virtue' of Shang; and he was later deified as Cai Shen; the god of fortune.