The third section is the octagonal building preserved till today. It is a wooden pavilion building which was rarely seen in Qing Dynasty. The first and the second floor were pierced through and supported by 12 great Chinese fir logs. The hallway on the second floor adopts an octagonal shape with gable and hip roof.
Similar to the structure of the first floor, there are a living room and four rooms on the second floor. The facade of the first floor is built from wood, but the upper half of the rear wall is made of bricks and the lower half made of stony bars. The Octagonal Pavilion is one of the landmarks of Yenshui.
Some architecture components, such as wall locks (also known as "iron scissors") are displayed in the first floor, but the second floor is not open for the public.