Yandi
According to traditional accounts, the Yan Emperor meets the force of the "Nine Li" () under their bronze-headed leader, Chi You, and his 81 horned and four-eyed brothers and suffers a decisive defeat. He flees to Zhuolu and begs the Yellow Emperor for help. During the ensuing Battle of Zhuolu the Yellow Emperor employs his tamed animals and Chi You darkens the sky by breathing out a thick fog. This leads the emperor to develop the south-pointing chariot, which he uses to lead his army out of the miasma. He next calls upon the drought demon Nüba to dispel Chi You's storm. He then destroys the Nine Li and defeats Chi You. Later he engages in battle with the Yan Emperor, defeating him at Banquan and replacing him as the primary ruler.