Hēidì (Chinese: 黑帝; lit. 'Black Deity') or Hēishén (黑神; 'Black God'), who is the Běidì (北帝; 'North Deity', Cantonese: Pak Tai) or Běiyuèdàdì (北岳大帝; 'Great Deity of the Northern Peak') is a deity in Chinese religion, one of the cosmological "Five Forms of the Highest Deity" (五方上帝; Wǔfāng Shàngdì). He is also identified as Zhuānxū (颛顼), today frequently worshipped as Xuánwǔ (玄武; 'Dark Warrior') or Zhēnwǔ (真武), and is associated with the essence of water and winter. His animal form is the Black Dragon and his stellar animal is the tortoise-snake. By virtue of his association with the north he has been identified and revered frequently as a representation of the supreme God of Heaven.