The Nine Emperor Gods are the sons of Father Emperor Zhou Yu Dou Fu Yuan Jun (斗父周御國王天尊) and the North Star Dou Mu Yuan Jun (斗母元君).
They are the seven (visible) stars that make up the Big Dipper, plus another two (invisible) ‘assistant’ stars.
The Nine Emperor Gods are often wrongly conflated with folk heroes like the sea pirates of the Ming dynasty who plotted to overthrow the Qing dynasty. They are actually high ranking Star Lords who preside over the movement of planets and coordinate mortal Life and Death issues.
Their parents, Dou Fu and Dou Mu, hold the Registrar of Life and Death.
The festival for the Emperor Gods lasts nine days, from the eve of the ninth lunar month.