Stories or jokes of ancient people conveying information are easy to understand, about 50 words.

According to China's ancient rare book Shan Hai Jing, there are three kinds of bluebirds, namely Zhao Lan and Yan Zi (the author has not found the name of another bluebird). They are the attendants and messengers of the Queen Mother of the West, who can fly over Qian Shan to deliver information and good news of good luck, happiness and happiness to the world. It is said that the Queen Mother of the West once wrote a letter to Emperor Wu of the Han Dynasty. The Queen Mother of the West sent a book to the Jade Bird, and the Jade Bird always sent the letter from the Queen Mother to the Chenghua Temple in the Han Palace. In later myths, the bluebird gradually evolved into the king of birds-Phoenix.