Introduction to Mengtanxuan: Mengtanxuan was built on the left side of Tage'an Pavilion. It is a 14-room bungalow with brick and wood structure. There is a small courtyard in front, decorated with bamboo, stone, flowers and trees, which is quiet and elegant. There is a small courtyard facing the river in the back, except for planting flowers. There are empty flowers and leaking windows on the courtyard wall for viewing the scenery on the lake. The pavilion displays calligraphy, paintings, pictures, ancient steles and other cultural relics, and the four treasures of the study are prepared for visitors to write their own feelings by splashing ink and brush.