There are few women who are famous in the history, even fewer women who are famous in the official history, and even fewer women are listed in the "Biography". Empress Dowager Xiao of the Liao Kingdom was ranked first in the "History of the Liao·Biography" as a female prostitute. She was in power for forty years and ushered in a prosperous period of the Liao Kingdom. She personally led the attack on the Song Dynasty, sent troops to Bianliang, the capital of the Song Dynasty, and forced Zhenzong of the Song Dynasty to sign the "Tan Yuan Alliance". She was both powerful and in love throughout her life, and she can be called a legend throughout her life.