Ruler of heaven in Chinese folk religion and Taoism, presiding over a heavenly court run like an imperial government. In 西游记 he is the emperor whose palace 孙悟空 wrecks.
The Jade Emperor is the supreme ruler of the heavenly court.
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Hokkien speakers call him 天公 'Lord of Heaven', so his birthday on the 9th day of the first lunar month is 天公生. In Malaysia and Singapore it is big enough to be called 'Hokkien New Year', and sugarcane is among the offerings.
Chief deity of the Taoist heavens and the bureaucratic pantheon that developed around it. Oversees the Heavenly Court (天庭), a mirror of the imperial bureaucracy, with subordinates like 王母娘娘 (Queen Mother of the West), 太白金星, and the 四大天王. Plays a central role in 《西游记》, where Sun Wukong's rebellion is directed at his court.