This book mainly introduces the origin of the Yao ethnic group's King Pan Festival. The King Gao rebelled. In order to encourage his people to actively fight back and win the war, Emperor Ku made a promise: Whoever can cut off the head of the King Gao will marry his beautiful little daughter -- the third princess. After hearing of the news, Pan Hu who was a dragon dog managed to achieve the goal. However, the emperor did not want to keep his promise after learning that Pan Hu was a dragon dog. The third princess found that Pan Hu was very kind and brave, and decided to marriage him. Later, the third princess learned that Pan Hu could become a human as long as he was steamed in a steamer for seven days and nights. After Pan Hu was transformed into a human, the emperor sent Pan Hu to the Kuaiji Mountain to be the king. From then on, Pan Hu was called King Pan Hu. Later, during a hunting process, King Pan Hu fell off a cliff and died. In order to commemorate him, people set his birthday October 16th in the lunar calendar as the “King Pan Festival”.