Pak Tai (北帝; pinyin běidì) is a Taoist god of the North. Many Chinese celebrate his birthday on April 21.
Pak Tai, also named Yuen Tin Sheung Tai (玄天上帝) (Supreme Emperor of the Northern Heaven or the Mysterious Heaven), was a prince of the Shang Dynasty. During the fall of the Shang Dynasty, the Demon King ravaged the world. The Taoist Primeval Deity (also known as Yuen Chi Tin Chuen (元始天尊)) then ordered the Jade Emperor to appoint Pak Tai as the commander of twelve heavenly legions to fight the evil. Pak Tai defeated the Demon King and was subsequently granted the title of Supreme Emperor of the Mysterious Heaven. In Pak Tai temples, the bronze tortoise and serpent under the feet of Pak Tai's image signifies that the good will always prevails over the evil.
In Hong Kong, it is worshipped among other places in:
Yuk Hui Temple aka. Pak Tai Temple, No. 2 Lung On Street, Wan Chai (Grade I)