Introduction to the ancient stage of the Yuan Dynasty: The ancient stage of the Yuan Dynasty in Zhangbi Castle is located in the temple of King Kehan. According to research by experts from the Ministry of Construction, the stage was built using the "column shifting and column reduction" technique that flourished in the Liao Dynasty, that is, by shifting or reducing several inner columns to increase space. There are tortoise shell patterns of "luck and longevity" on the eight-character screen wall, and it is recorded on the beam that it was rebuilt in the 35th year of Qianlong's reign in the Qing Dynasty. On the ground in front of the stage, there are thirteen horizontal and five vertical lines arranged with river pebbles, which means "five dragons facing the stage". There is a tunnel underground in front of the stage, and there will be a unique urn sound when singing. What is performed on the stage of Kehan Temple is generally Jiexiu's unique local opera "Gandiao Yangko" without drum music.