Which Taoist deity is traditionally regarded as the ruler of Heaven?

The Jade Emperor is traditionally regarded in Taoism and Chinese popular religion as the ruler of Heaven.

Known in Chinese as Yuhuang Shangdi or Yudi, the Jade Emperor presides over a celestial bureaucracy that mirrors aspects of an earthly imperial government. Myths describe heavenly officials, departments, registers, and judgments operating under his authority.

The deity became especially prominent in organized religious Taoism and popular worship, although Taoist traditions do not all assign him exactly the same theological status. He is often treated as a high celestial ruler rather than as the ultimate principle of the Dao itself.

The Jade Emperor is sometimes confused with Laozi, who was deified in some Taoist traditions, and with the Three Pure Ones, a major Taoist triad. His birthday is celebrated on the ninth day of the first lunar month in several Chinese communities, though customs vary by region.