 In Taoist mythology, he was once a prince of the Shang Dynasty, and then appointed by Jade Emperor to fight the Demon King during the fall of the dynasty.He triumphed in the combat even though the Demon King conjured out a grey tortoise and a gigantic serpent for help.After this victory, Pak Tai was awarded the title of Yuen Tin Sheung Tai and is worshipped for his power, courage and devotion.