Introduction to the blue brick wall: There are tall green brick walls on the east and west sides of the Governor's Palace. There is a tall facade on the main entrance, a large semicircular moon door below, and the second and third floor walls of the facade. There are brick eaves on the top, and there are exquisite carvings on the brick eaves. The three-story brick eaves door face is shaped like clouds, and the moon door under the door face forms a colorful cloud arching over the moon.