What is a bluebird

Blue bird: According to legend, Emperor Wudi of Han Dynasty offered sacrifices in Yonghua Hall on July 7, suddenly a blue bird flew from the West, and Dongfang Shuo said that it was because the West Queen Mother was coming. Then he used it as a messenger of the message.

Sui Xue Daoheng "Yu Zhang line" : "Would like to be the queen mother three blue birds, flying around to spread the news."

Tang Li Shangyin "Untitled" : "Pengshan this to no more road, blue birds for the visit."