Introduction to Jiashan Hall: The main building facilities of Ouyuan are: Yishan (artificial rockery, divided into three peaks in the east, west and middle), Yitang (Jiashan Hall), Ershui (cave spring water, waterfall water), Ershui (cave spring water, waterfall water), Gate (Ouyuan Gate Wooden Green Gate), Three Bridges (Big Stone Bridge, Hengshi Bridge, Waterfall Bridge), Three Pavilions (Yunjing Pavilion, Green Ge Pavilion, Songfeng Pavilion), Four Ponds (Fish Pond, Reservoir) , square pool, waterfall pool), five pavilions (Youshi Pavilion, Wenshan Pavilion, Yicao Pavilion, Jinqiao Pavilion, Woyun Pavilion). The Taihu stone in front of the stone pavilion is the best of its kind. In addition, there are also buildings such as small studios, secluded rooms, and mountain teahouses.