Introduction to Haiyuan Pavilion: Haiyuan Pavilion is one of the most famous private libraries in the history of Qing Dynasty in my country. The total collection of books is more than 200,000 volumes, including more than 10,000 rare volumes of Song and Yuan Dynasties. Together with Wenyuan Pavilion and Huangshichen in Beijing and Tianyi Pavilion in Ningbo, it is a model of public and private book collection in Chinese history. It is located in the Yang family residence on the north side of Wanshouguan Street Road, south of Guangyue Tower, Dongchangfu District.