Zhang Daoling
Guan Yu is revered as "Holy Ruler Deity Guan" () and a leading subduer of demons in Taoism. Taoist worship of Guan Yu began during the Song dynasty. Legend has it that during the second decade of the 12th century, the saltwater lake in Xiezhou gradually ceased to yield salt. Emperor Huizong then summoned Zhang Jixian (), a 30th-generation descendant of Zhang Daoling, to investigate the cause. The emperor was told that the disruption was the work of Chi You, a deity of war. Zhang Jixian then recruited the help of Guan Yu, who battled Chi You over the lake and triumphed, whereupon the lake resumed salt production. Emperor Huizong then bestowed upon Guan Yu the title "Immortal of Chongning" (), formally introducing the latter as a deity into Taoism.