One is Wu Wu, a legendary witch doctor. A minister during the time of Emperor Yao of Tang, "who used the art of the swan to heal Yao, could pray to prolong people's blessings, cure people's illnesses, pray for trees and they would wither, pray for birds and they would fall." The "Chu Ci" records, "Wuxian will descend in the evening." Wang Yi notes that "Wuxian is an ancient divine shaman." The oracle bone inscriptions mention Xian Wu. Therefore, some scholars believe that Wuxian might be the minister of King Tai Wu of Shang.